aqua has been in the dark realm for like 11 years now and has shown no sign of age and she hasnt even grow out of her clothes( which wouldve been pretty hot if u know wat i mean) but look at sora, kairi, and riku in 1 year their looks hav changed ALOT!!!!!! how could this be.

maybe one of the advantages of being in the realm of darkness is that you never age

if that's true then i wanna be in the realm of darkness

You do not age in the realm of darkness. Your appearence does not change. Aqua could have been in the darkess for like a couple months, and in those couple months, in the realm of light like 5 years have passed.(example)

Like the others said, aging does not effect you in the realm of darkness, and if it does, it happens over a very long period of time. It's sort of like Narnia only in Narnia you go faster then the real world where is in the realm you go slower then the real world.

Age very slowly in the Realm of Darkness, that's why she hasn't changed...

How Aqua eat food or drink, sleep or going to the toilet in darkness?

How Aqua eat food or drink, sleep or going to the toilet in darkness?

 

When have you ever seen an KH character eat, drink, sleep, or use the bathroom in the games other then in a few cutscenes? And potions don't count as food or drink as you toss it above your head and the effect comes up so you don't actually need it.

 

Apparently in the KH universe those things are not needed to survive and are only done when the person feels like it.

Time goes very slow in the realm of darkness I believe

The realm of darkness may affect time. What my seem like a few days in the darkness may be a few years out in the world.

so shes only been in there for like, 5 months >: o

As far as I can tell, time flows entirely differently in the Realm of Darkness. In the real ending, shortly after Aqua defeats Xehanort, she is already saying she has no idea how she has been there. So I think that time is a completely different concept in the Realm of Darkness.