Sprawled over several threads I collected all theories on how all KH heart theories go together and it finally makes sense:
1 Somebody = 1 Heart + 1 Body + 1 Mind / Soul
Example: Riku
1 Heartless = 1 Heart (stolen)
Example: Soldier (Emblem Heartless)
or
1 Heartless = 0 Heart
Example: Shadow (Pureblood Heartless)
1 Nobody = 1 Body
Example: Dusk
1 Sentiment / Will = 1 Mind / Soul
Example: Lingering Sentiment (Terra’s Will)
1 Unversed = 0 0 0 (hence not well versed with life!)
but negative emotion and pure darkness involved
(also memories?)
Example: Flood
There's also the concept of memories which is closely related to the mind and heart.
Special Cases:
Special Somebody: 2 Hearts + 1 Body + 1 Mind / Soul
Example: Sora
Special Somebody PoH: Pure Light Heart + 1 Body + 1 Mind / Soul
Example: Snow White
Special Somebody PoH: 1 Body + 1 Mind / Soul (Heart does not fade into Darkness)
Example: Kairi
Special Heartless Sora: 0 Heart(s) + 1 Mind /Soul
Example: Sora
Special Heartless Ansem: 1 Heart + 1 Body + 1 Mind / Soul
Special Nobody: 1 Body + 1 Mind / Soul
Example: Zexion
Special Nobody: 1 Body + 1 Mind / Soul [+ 1 Heart]
Example: Axel
So when a Somebody loses his heart he creates a heartless. The heart fades into darkness.
The being left behind is a manifestation of the darkness the heart fades into.
The classic form of a heartless has no heart and has a void form and no mind (classic case of a shadow creation).
These heartless try to "steal hearts" (presumably of people - thus creating more heartless - and if they get the chance to, also those hearts lingering in the darkness).
If a heartless manages to get a heart, this heart is released when he gets destroyed (Emblem Heartless).
High Heartless can have a form and even carry over the mind (Seeker of Darkness)
The body that is left behind turns into a mindless shell (classic case of a dusk creation)
When the Somebody had a strong mind, this person also can create a high nobody (Org. XIII)
therefore the persons left behind will and body from a new existence.
This existence might be able to grow a new heart (details fruther down).
The concept of "body" I speak of refers to an "own" body as a person, similar (roxas) or identical to the regional Somebody (Axel).
While pureblood heartless or unversed can easily be imagines as lacking a body, higher heartless also lose their original forms and are therefore counted as formless or bodiless.
Dusk and other lower nobodies are counted as having a body and yet this body gets changed. While higher nobodies can easily be imagined as having a bodily form, those lower nobodies (like dusks) still have some kind of shell-like body because they are what is left of a person's body-shell in the first place.
This theory is also supported by the fact that nobodies (no matter whether humanoid or dusk) are higher beings than heartless because they consist certainly of at least one part (body) and this tries to from a second component of existence (heart) and higher ones even a will (making them like a complete being just the original being and heart is gone). So Nobodies have 1 or 2 or all 3 parts.
Heartless don't have to have either to exist and lack minds in 99% of cases, and a body.
And heartless lack their own hearts!
We do not know if a pureblood heartless can change into an emblem heartless by stealing a heart or if the heartless has to stew a heart before manifesting from the darkness.
Another point is that heartless STEAL hearts and therefore do not have their own hearts!
Therefore they do not have control over this heart (thus they act like beasts) because they contain a random heart.
Ansem, Seeker of Darkness, is the notable exemption because he gave up his heart on purpose and therefore could exist. He released his heart which didn't get swallowed by darkness but he regained control over it (and as a bodiless form he could initiate time travel - and this is the reason why not everyone can do it). So he was reduced to heart and mind. Xemnas was formed with mind and body. Therefore Ansem was almost complete again after regaining his body with Riku's help after possessing him and gathering strength in the process.
It depends whether memories are also part of the mind or not.
Too little is known about minds- like if memories are carried over as part of the mind (like most regular high nobodies) or not (roxas) and if this is part of the mind at all.
Also the case of sentiments is not completely probed yet.
Basically, minds are entities of self-consciousness (lingering sentiment) but memories are closely connected and even more important!
So memories are definnitely engraved in the hearts in any way [Naminé says so] and therefore if the heart is lost memories can also stick to minds as a backup (therefore Lingering sentiment remembers Ven and Aqua lost and hatred for Xehanort although Terra's heart is lost to Xehanort) (or each high Nobody rememebers without having a heart)
To exist on its own, aka to form a sentiment, a mind has to be extraordinarily strong!
And therefore we can say a mind is "merely" a concept of self-reflexion/awareness and existence.
It's easier to think about it this way than to call is soul because souls are surely harder to vanquish and recreate from scratch than the mind/awareness.
Xehanort (apprentice) is even seen to "split" his will, as both his Heartless (Ansom) and Nobody (Xemnas) are 100% self-conscious each and acting as 2 individuals. [You see, it's rather a concept of self-awareness as a being rather than a soul concept]
And actually it does not matter Lea's mind got transformed when turned into Axel. And it doesn not make any difference if Axel's mind fades completely and Lea's mind is recreated or if Axel's mind is just turned back into Lea's.
The main point is that Lea was self-consious as Lea then also as Axel and then again also when becoming Lea again. [Maybe even slightly different each time (Axel is definitely more reluctant than Lea due to his missing heart in the begining - as well as Xehanort's manipulations) but It stays the SAME guy! Same memories- Proof: "Got it memorized?"]
And this is also the main reason this concept plays a minor role in the series.
If a Somebody dies, the Heart, Body as well as Mind die too!
We also know that the heart is the CORE of existence and one only dies when the (original) heart dies or fades.
Ansem was reduced to just a heart without a body (and existence hence mind?)
In the worst case a weak somebody is reduced to a heart which is stolen by a formless shadow and mind as well as body fade. But the person is not dead until the heart dies and still can be saved.
In order to erase someone completely from existence in the KH universe one would have to steal the person's heart. then distroy the remaining nobody (and if it's a higher nobody it's will) so there is no chance (or known way) the person's body could be restored. Next one would have to vanquish the heartless holding this heart and release the heart. The heart has nowhere to return to and would fade into darkness again or get caught up inside another heartless so one has to either gather it using a Keyblade or other device.
As the last step one would have to destroy the heart which is now the floating essence of the person's existence as neither body, nor will exist. With the heart the existence as well as the memory would be erased and the person is gone forever.
But basically, a heart is never lost for good, unless it is specifically targeted and destroyed like in the case I just mentioned.
In some part of the reports, the soul is mentioned with a connection to the mind and heart.
So when someone really dies in KH series,
1) Body
2) Mind
3) Heart
Die and therefore
4) memories
5) soul
Die with them and the person is completely annihilated.
If a Heartless dies, the Heart gets released
but it will return to darkness and might even get captured by yet another heartless
unless released with a "key" (to be gathered at a central place a.k.a. Kingdom Hearts [of hearts] )
If a pureblood heartless dies, the darkness manifested fades away.
If a Nobody dies, The Body and Mind die [and the Heart dies]
Therefore:
1) The Princesses of Heart must be protected at all costs in order to protect their lights, cuz if they die, the light dies!
2) Axel and all other Nobodies GREW or nurtured their own hearts, of course!! (or at least partly or fragments of hearts) Therefore they were able to feel and act.
This process of growing a heart is a natural process of the body of the original Somebody to replace what has been lost. It is unclear and unlikely a heart can be regained completely on this way. (these hearts "grow" so Nobodies can have fractions of hearts)
This process has to be initiated by the connection with a REAL heart.
Axel's case is the prime example for Sora's heart touching a Nodody and therefore initiating the growth of a heart. Axel is surprised he is enjoying his schemes in Castle Oblivion and states Sora 'must have rubbed off'. In KHII Xemnas confirms Sora's influence.
Some other Nobodies in the Organization also grew hearts (or heart-buds) in order to her able to enjoy things (larxene - she enjoys pain?) [Luxord's love for his games; Demyx's music and fear].
WHEN Axel died, his body, mind and HEART died.
And then LEA got restored with LEA's Heart (this is why the heartless has to be felled before this to release the original somebody’s heart)
LEA: 1 Body, 1 Mind, 1 Heart
Lost his heart and created:
AXEL: 1 Body (Leas Body therefore he looks the same), 1 Mind
Shadow (presumably): Lea’s Heart
Axel grew a new heart and therefore was a complete incomplete being.
Axel: Body, Mind, Heart (of facture of a heart)
Shadow is felled: Lea’s heart is released.
Axel died: Axel’s body, Mind and Heart fade away.
But
Lea is restored with his original Heart which is now free and his mind and body are restored too.
[There is also a theory that says that the mind never fades until the somebody dies but the mind is rather carried over to the next high existence, so Lea's got definitely transferred over to Axel but it is unclear whether Axel's mind dies and Lea's got recreated or if Axel's got restored as Lea's but it doesn't matter because the memories are the most important part and they are part of heart and mind!]
[Roxas' case if different alltogether and contradicts the main mind theory cuz Roxas, just like Naminé, has his own mind and if he were to die, his body, his mind (and Ven's heart) were to die and fade away - and how Sora would have been affected is unclear - mostly through his memories; also Ven's reaction to this fatal case is unprobed]
Therefore, it does not matter whether nobodies grew their own hearts cuz if they died these hearts faded away anyway just like their existence and the original being got restored.
HOWEVER:
This is not true for
SORA – ROXAS (Special Origin + Heart transfer +Reunion)
KAIRI - NAMINE (Special Origin + Reunion)
XION (did she ever have a heart?)
AS IN DDD: Data DiZ states that Sora has been able to reunite with his Nobody without destroying him!
Axel died in order to revive (as) Lea.
Roxas never died, neither did Namine.
Assuming Roxas didn’t have the need to grow a heart cuz he had Ven’s how could he ever be restored as an own person as he is the only nobody completely without an own heart??
Do you think Xion grew a heart too? If so her heart most likely faded away too.
If Namine grew a heart, Kairi harbors it so namine would be easier to rstore as her own existence.
Poor Roxas! Seems like he is the biggest nobody of them all!
[Roxas might very well have started growing his own heart because he had Ven's heart inside of him. This heart was sleeping (which supports the thesis why he might have grown an own heart in the first place) but complete and therefore he could cry as the only nobody.]
So according to all this Axel is Lea while not being Lea. So Axel really died while really being restored as Lea. So if Roxas ever got his own existence, the Axel/Lea he were to meet was not the same Axel he knew.
So it is a sad story after all.
Therfore, truly all (org. XIII) nobodies (including their bodies and possible hearts) are gone and their original selves are back!!
This is why Lea does not have Axel's cheek marks!!
And lastly:
1) It would be impossible to have Axel coexist with Lea
because Axel HAD to die in order to Revive Lea
(cuz lea was gone unless somone would have restored him from his shadow / heartless form but there was no special heart involved like in sora's Kairi's case)
2) It would have been unneccessary to have Lea AND Axel cuz they are 1 and the same existence!
and I don't think this would have been scientiffically possible (again no Pure light involved)
3) The Special Case of Namine and Roxas is different cuz they do not only coexist with their somebodies
but they also are their own existences and identities right from the beginning (like Mr. Nomura and DiZ stated since KHII they are most special Nobodies!!)
4) In case anyone is wondering WHO and WHY almost all characters that show up in DDD behind Sora in his "my friends are my power" statement against Xigbar, or Xemnas or Xehanort Junior (don't rmemebr, sora just states he's proud to be part of something bigger) These Are ALL heart connected to Sora AND Ven’s Heart! Either because they have close connections through friendship or love, or because they have somehow connected hearts
My Only Question was: WHY is Naminé missing as the only one, all other main Characters are present.
The reason is: Naminé is connected to Kairi’s Heart. It would be OK to include Naminé in this list but she is only connected to Sora’s heart in a “once removed instance”.
Finally here is a list of everything connected to Sora’s Heart:
Sora’s Heart:
Ties of Love:
Kairi
Ties Of Friendship:
Riku
Donald
Goofy
(Mickey)
Connected Hearts:
Roxas
[Xion] (in case Roxas Has a Heart she is a tie of friendship of Roxas’ heart; but still included as she is/was a replica of sora directly that was influenced by Sora’s memories of Kairi)
Ven
Ven is the Connection cuz his own heart has other connections:
Ven’s Heart:
Ties of Friendship:
Aqua
Terra
Mickey (I think Mickey is even featured in his BbS outfit, hence the inclusion here)
Naminé is connected to Sora because Sora harbored KAiri’s heart during KH1.
When Releasing his and Kairi’s Heart both Roxas and Naminé were born.
For this reason and because of this connection Naminé has pwers over Sora (or more precisely his memories).
As Kairi’s Heart is no longer directly with Sora’s Naminé should be connected in a second instance like this:
Sora’s Heart:
Ties of Love:
Kairi
[…]
Kairi’s Heart:
= Pure heart of light
Ties of Love:
Sora
Ties of Friendship:
Riku
Selphie
Wakka
Tidus
Princesses of Heart
Demyx
Connected Hearts
Naminé
Naminé could also be included in a
“Memories connection” section for Sora
Just like Xion can be included in this category for kairi.
Lastly
Roxas is the most complicated of them all because we don’t
Know for sure whether he has a heart on his own:
Roxas’ Heart:
= nonexistent???
= Ven’s Heart
Ties of Love:
Naminé
Ties Of Friendship:
Axel
Xion
Demyx (he talks quite often about him compared to other members)
Hayner
Pence
Olette
Furthermore:
Genie
Zero (Jack’s dog)
(Riku?)
Ties of connected hearts:
Ven
Sora
[Xion] (depending on what happened to her existence)
And to round it up:
The memory connections for Roxas include:
Naminé (therefore shw and DiZ were able toreimplant the lost (Xion) memories at the beginning of KHII)
Kairi (due to the closeness of Sora’s And Kairi’s heart at the creation of Naminé and Roxas all 4 of them are closely related and therefore wehen Naminé restored Sora’s Memory through Roxas in KHII Roxas was able to connect with Kairi and help her remember Sora’s name)
These are just tiny extracts from all the connections of hearts; I forgot too many Ties of friendship (Selphie, Tidus, Wakka, Hayner, Olette, Pence) but I think I covered the most prominent.
End of Theory :D
PS: I rewrote some parts and edited several unclear passages. I hope everything is more precise now.
Sprawled over several threads I collected all theories on how all KH heart theories go together and it finally makes sense:
1 Somebody = 1 Heart + 1 Body + 1 Mind / Soul
Example: Riku
1 Heartless = 1 Heart (stolen)
Example: Soldier (Emblem Heartless)
or
1 Heartless = 0 Heart
Example: Shadow (Pureblood Heartless)
1 Nobody = 1 Body
Example: Dusk
1 Sentiment / Will = 1 Mind / Soul
Example: Lingering Sentiment (Terra’s Will)
1 Unversed = 0 0 0 (hence not well versed with life!)
but negative emotion and pure darkness involved
(also memories?)
Example: Flood
There's also the concept of memories which is closely related to the mind and heart.
Special Cases:
Special Somebody: 2 Hearts + 1 Body + 1 Mind / Soul
Example: Sora
Special Somebody PoH: Pure Light Heart + 1 Body + 1 Mind / Soul
Example: Snow White
Special Somebody PoH: 1 Body + 1 Mind / Soul (Heart does not fade into Darkness)
Example: Kairi
Special Heartless Sora: 0 Heart(s) + 1 Mind /Soul
Example: Sora
Special Heartless Ansem: 1 Heart + 1 Body + 1 Mind / Soul
Special Nobody: 1 Body + 1 Mind / Soul
Example: Zexion
Special Nobody: 1 Body + 1 Mind / Soul [+ 1 Heart]
Example: Axel
So when a Somebody loses his heart he creates a heartless. The heart fades into darkness.
The being left behind is a manifestation of the darkness the heart fades into.
The classic form of a heartless has no heart and has a void form and no mind (classic case of a shadow creation).
These heartless try to "steal hearts" (presumably of people - thus creating more heartless - and if they get the chance to, also those hearts lingering in the darkness).
If a heartless manages to get a heart, this heart is released when he gets destroyed (Emblem Heartless).
High Heartless can have a form and even carry over the mind (Seeker of Darkness)
The body that is left behind turns into a mindless shell (classic case of a dusk creation)
When the Somebody had a strong mind, this person also can create a high nobody (Org. XIII)
therefore the persons left behind will and body from a new existence.
This existence might be able to grow a new heart (details fruther down).
The concept of "body" I speak of refers to an "own" body as a person, similar (roxas) or identical to the regional Somebody (Axel).
While pureblood heartless or unversed can easily be imagines as lacking a body, higher heartless also lose their original forms and are therefore counted as formless or bodiless.
Dusk and other lower nobodies are counted as having a body and yet this body gets changed. While higher nobodies can easily be imagined as having a bodily form, those lower nobodies (like dusks) still have some kind of shell-like body because they are what is left of a person's body-shell in the first place.
This theory is also supported by the fact that nobodies (no matter whether humanoid or dusk) are higher beings than heartless because they consist certainly of at least one part (body) and this tries to from a second component of existence (heart) and higher ones even a will (making them like a complete being just the original being and heart is gone). So Nobodies have 1 or 2 or all 3 parts.
Heartless don't have to have either to exist and lack minds in 99% of cases, and a body.
And heartless lack their own hearts!
We do not know if a pureblood heartless can change into an emblem heartless by stealing a heart or if the heartless has to stew a heart before manifesting from the darkness.
Another point is that heartless STEAL hearts and therefore do not have their own hearts!
Therefore they do not have control over this heart (thus they act like beasts) because they contain a random heart.
Ansem, Seeker of Darkness, is the notable exemption because he gave up his heart on purpose and therefore could exist. He released his heart which didn't get swallowed by darkness but he regained control over it (and as a bodiless form he could initiate time travel - and this is the reason why not everyone can do it). So he was reduced to heart and mind. Xemnas was formed with mind and body. Therefore Ansem was almost complete again after regaining his body with Riku's help after possessing him and gathering strength in the process.
It depends whether memories are also part of the mind or not.
Too little is known about minds- like if memories are carried over as part of the mind (like most regular high nobodies) or not (roxas) and if this is part of the mind at all.
Also the case of sentiments is not completely probed yet.
Basically, minds are entities of self-consciousness (lingering sentiment) but memories are closely connected and even more important!
So memories are definnitely engraved in the hearts in any way [Naminé says so] and therefore if the heart is lost memories can also stick to minds as a backup (therefore Lingering sentiment remembers Ven and Aqua lost and hatred for Xehanort although Terra's heart is lost to Xehanort) (or each high Nobody rememebers without having a heart)
To exist on its own, aka to form a sentiment, a mind has to be extraordinarily strong!
And therefore we can say a mind is "merely" a concept of self-reflexion/awareness and existence.
It's easier to think about it this way than to call is soul because souls are surely harder to vanquish and recreate from scratch than the mind/awareness.
Xehanort (apprentice) is even seen to "split" his will, as both his Heartless (Ansom) and Nobody (Xemnas) are 100% self-conscious each and acting as 2 individuals. [You see, it's rather a concept of self-awareness as a being rather than a soul concept]
And actually it does not matter Lea's mind got transformed when turned into Axel. And it doesn not make any difference if Axel's mind fades completely and Lea's mind is recreated or if Axel's mind is just turned back into Lea's.
The main point is that Lea was self-consious as Lea then also as Axel and then again also when becoming Lea again. [Maybe even slightly different each time (Axel is definitely more reluctant than Lea due to his missing heart in the begining - as well as Xehanort's manipulations) but It stays the SAME guy! Same memories- Proof: "Got it memorized?"]
And this is also the main reason this concept plays a minor role in the series.
If a Somebody dies, the Heart, Body as well as Mind die too!
We also know that the heart is the CORE of existence and one only dies when the (original) heart dies or fades.
Ansem was reduced to just a heart without a body (and existence hence mind?)
In the worst case a weak somebody is reduced to a heart which is stolen by a formless shadow and mind as well as body fade. But the person is not dead until the heart dies and still can be saved.
In order to erase someone completely from existence in the KH universe one would have to steal the person's heart. then distroy the remaining nobody (and if it's a higher nobody it's will) so there is no chance (or known way) the person's body could be restored. Next one would have to vanquish the heartless holding this heart and release the heart. The heart has nowhere to return to and would fade into darkness again or get caught up inside another heartless so one has to either gather it using a Keyblade or other device.
As the last step one would have to destroy the heart which is now the floating essence of the person's existence as neither body, nor will exist. With the heart the existence as well as the memory would be erased and the person is gone forever.
But basically, a heart is never lost for good, unless it is specifically targeted and destroyed like in the case I just mentioned.
In some part of the reports, the soul is mentioned with a connection to the mind and heart.
So when someone really dies in KH series,
1) Body
2) Mind
3) Heart
Die and therefore
4) memories
5) soul
Die with them and the person is completely annihilated.
If a Heartless dies, the Heart gets released
but it will return to darkness and might even get captured by yet another heartless
unless released with a "key" (to be gathered at a central place a.k.a. Kingdom Hearts [of hearts] )
If a pureblood heartless dies, the darkness manifested fades away.
If a Nobody dies, The Body and Mind die [and the Heart dies]
Therefore:
1) The Princesses of Heart must be protected at all costs in order to protect their lights, cuz if they die, the light dies!
2) Axel and all other Nobodies GREW or nurtured their own hearts, of course!! (or at least partly or fragments of hearts) Therefore they were able to feel and act.
This process of growing a heart is a natural process of the body of the original Somebody to replace what has been lost. It is unclear and unlikely a heart can be regained completely on this way. (these hearts "grow" so Nobodies can have fractions of hearts)
This process has to be initiated by the connection with a REAL heart.
Axel's case is the prime example for Sora's heart touching a Nodody and therefore initiating the growth of a heart. Axel is surprised he is enjoying his schemes in Castle Oblivion and states Sora 'must have rubbed off'. In KHII Xemnas confirms Sora's influence.
Some other Nobodies in the Organization also grew hearts (or heart-buds) in order to her able to enjoy things (larxene - she enjoys pain?) [Luxord's love for his games; Demyx's music and fear].
WHEN Axel died, his body, mind and HEART died.
And then LEA got restored with LEA's Heart (this is why the heartless has to be felled before this to release the original somebody’s heart)
LEA: 1 Body, 1 Mind, 1 Heart
Lost his heart and created:
AXEL: 1 Body (Leas Body therefore he looks the same), 1 Mind
Shadow (presumably): Lea’s Heart
Axel grew a new heart and therefore was a complete incomplete being.
Axel: Body, Mind, Heart (of facture of a heart)
Shadow is felled: Lea’s heart is released.
Axel died: Axel’s body, Mind and Heart fade away.
But
Lea is restored with his original Heart which is now free and his mind and body are restored too.
[There is also a theory that says that the mind never fades until the somebody dies but the mind is rather carried over to the next high existence, so Lea's got definitely transferred over to Axel but it is unclear whether Axel's mind dies and Lea's got recreated or if Axel's got restored as Lea's but it doesn't matter because the memories are the most important part and they are part of heart and mind!]
[Roxas' case if different alltogether and contradicts the main mind theory cuz Roxas, just like Naminé, has his own mind and if he were to die, his body, his mind (and Ven's heart) were to die and fade away - and how Sora would have been affected is unclear - mostly through his memories; also Ven's reaction to this fatal case is unprobed]
Therefore, it does not matter whether nobodies grew their own hearts cuz if they died these hearts faded away anyway just like their existence and the original being got restored.
HOWEVER:
This is not true for
SORA – ROXAS (Special Origin + Heart transfer +Reunion)
KAIRI - NAMINE (Special Origin + Reunion)
XION (did she ever have a heart?)
AS IN DDD: Data DiZ states that Sora has been able to reunite with his Nobody without destroying him!
Axel died in order to revive (as) Lea.
Roxas never died, neither did Namine.
Assuming Roxas didn’t have the need to grow a heart cuz he had Ven’s how could he ever be restored as an own person as he is the only nobody completely without an own heart??
Do you think Xion grew a heart too? If so her heart most likely faded away too.
If Namine grew a heart, Kairi harbors it so namine would be easier to rstore as her own existence.
Poor Roxas! Seems like he is the biggest nobody of them all!
[Roxas might very well have started growing his own heart because he had Ven's heart inside of him. This heart was sleeping (which supports the thesis why he might have grown an own heart in the first place) but complete and therefore he could cry as the only nobody.]
So according to all this Axel is Lea while not being Lea. So Axel really died while really being restored as Lea. So if Roxas ever got his own existence, the Axel/Lea he were to meet was not the same Axel he knew.
So it is a sad story after all.
Therfore, truly all (org. XIII) nobodies (including their bodies and possible hearts) are gone and their original selves are back!!
This is why Lea does not have Axel's cheek marks!!
And lastly:
1) It would be impossible to have Axel coexist with Lea
because Axel HAD to die in order to Revive Lea
(cuz lea was gone unless somone would have restored him from his shadow / heartless form but there was no special heart involved like in sora's Kairi's case)
2) It would have been unneccessary to have Lea AND Axel cuz they are 1 and the same existence!
and I don't think this would have been scientiffically possible (again no Pure light involved)
3) The Special Case of Namine and Roxas is different cuz they do not only coexist with their somebodies
but they also are their own existences and identities right from the beginning (like Mr. Nomura and DiZ stated since KHII they are most special Nobodies!!)
4) In case anyone is wondering WHO and WHY almost all characters that show up in DDD behind Sora in his "my friends are my power" statement against Xigbar, or Xemnas or Xehanort Junior (don't rmemebr, sora just states he's proud to be part of something bigger) These Are ALL heart connected to Sora AND Ven’s Heart! Either because they have close connections through friendship or love, or because they have somehow connected hearts
My Only Question was: WHY is Naminé missing as the only one, all other main Characters are present.
The reason is: Naminé is connected to Kairi’s Heart. It would be OK to include Naminé in this list but she is only connected to Sora’s heart in a “once removed instance”.
Finally here is a list of everything connected to Sora’s Heart:
Sora’s Heart:
Ties of Love:
Kairi
Ties Of Friendship:
Riku
Donald
Goofy
(Mickey)
Connected Hearts:
Roxas
[Xion] (in case Roxas Has a Heart she is a tie of friendship of Roxas’ heart; but still included as she is/was a replica of sora directly that was influenced by Sora’s memories of Kairi)
Ven
Ven is the Connection cuz his own heart has other connections:
Ven’s Heart:
Ties of Friendship:
Aqua
Terra
Mickey (I think Mickey is even featured in his BbS outfit, hence the inclusion here)
Naminé is connected to Sora because Sora harbored KAiri’s heart during KH1.
When Releasing his and Kairi’s Heart both Roxas and Naminé were born.
For this reason and because of this connection Naminé has pwers over Sora (or more precisely his memories).
As Kairi’s Heart is no longer directly with Sora’s Naminé should be connected in a second instance like this:
Sora’s Heart:
Ties of Love:
Kairi
[…]
Kairi’s Heart:
= Pure heart of light
Ties of Love:
Sora
Ties of Friendship:
Riku
Selphie
Wakka
Tidus
Princesses of Heart
Demyx
Connected Hearts
Naminé
Naminé could also be included in a
“Memories connection” section for Sora
Just like Xion can be included in this category for kairi.
Lastly
Roxas is the most complicated of them all because we don’t
Know for sure whether he has a heart on his own:
Roxas’ Heart:
= nonexistent???
= Ven’s Heart
Ties of Love:
Naminé
Ties Of Friendship:
Axel
Xion
Demyx (he talks quite often about him compared to other members)
Hayner
Pence
Olette
Furthermore:
Genie
Zero (Jack’s dog)
(Riku?)
Ties of connected hearts:
Ven
Sora
[Xion] (depending on what happened to her existence)
And to round it up:
The memory connections for Roxas include:
Naminé (therefore shw and DiZ were able toreimplant the lost (Xion) memories at the beginning of KHII)
Kairi (due to the closeness of Sora’s And Kairi’s heart at the creation of Naminé and Roxas all 4 of them are closely related and therefore wehen Naminé restored Sora’s Memory through Roxas in KHII Roxas was able to connect with Kairi and help her remember Sora’s name)
These are just tiny extracts from all the connections of hearts; I forgot too many Ties of friendship (Selphie, Tidus, Wakka, Hayner, Olette, Pence) but I think I covered the most prominent.
End of Theory
:D 
PS: I rewrote some parts and edited several unclear passages. I hope everything is more precise now.
Edited by MarkXIIII