How will Ven's heart leaving sora affect sora as a character? In KH DDD Xigbar made an interesting point when he said that sora's personality & memories weren't actually his. Would sora be completely different or maybe even weaker due to losing Ven's heart/influence considering that most of sora's moves were actually ven's?

Some of Sora's memories and personality aren't his, correct. But, I honestly don't expect much to change after he releases Ven's heart.

Would sora be completely different or maybe even weaker due to losing Ven's heart/influence considering that most of sora's moves were actually ven's?

 

I think you just found Nomura's excuse for making Sora Level 1 again

 

But really I don't think Sora will be too badly affected, since Ven didn't move into his heart until the end of BBS, and he seemed fine as a kid personality wise.

If anything it's more of a question of will Ven be able to survive without Sora's influence?

When Ventus' heart leaves Sora's body, Sora will without a doubt lose the ability to wield two Keyblades since one of those is Ven's. I don't believe Xigbar ever mentioned Sora's personality and memories not being his. His personality is definitely "a spitting image of Ven" and I believe his connection to him influences that, but returning  Ven's heart probably won't affect Sora's personality.

When Ventus' heart leaves Sora's body, Sora will without a doubt lose the ability to wield two Keyblades since one of those is Ven's. I don't believe Xigbar ever mentioned Sora's personality and memories not being his. His personality is definitely "a spitting image of Ven" and I believe his connection to him influences that, but returning  Ven's heart probably won't affect Sora's personality.

If it does, I expect Sora to be more of a happy doofus.

If it does, I expect Sora to be more of a happy doofus.

I hope not. Sora in Dream Drop Distance was too much of a doofus already.

Man i love how fast this community responds. Thanks everyone, this had me curious for a while now.

Would be interesting if that were the reason Sora would be a more serious type of character in 3.

sora will probably be the same as he's always been. hopefully SE won't intentionally write him to be an idiot like in 3D but we'll see. I don't mind a positive or happy go-lucky attitude but sora in 3D was a bit much. 

I expect Sora to be as serious as Riku in KH III.

He'd be a happy bunny, Sora gotten fed up of having other people harboring his own heart.

Sora is far too nice to do that.  Even DiZ admits that... No wonder he's chosen.

Well, when Ventus's heart leaves Sora, it'll no doubt leave a mark on Sora, since he's been carrying Ven's heart with him for 11 whole years!  I think that he's got to feel something, ya know?  Sora will lose the ability to dual wield, but I don't think that Sora's personality in and of itself will change.  Sure, Sora will be more mature in Kingdom Hearts III, but I don't think that he'll be wholly serious, ya know?

It turns out that, the moment Ven leaves, Sora becomes William Munny.