Can i ask again ehy do ray is inside the body of sooha Who is he

Sooha kind of created Ray in order to protect himself, so Ray is like his second personality

Aww this is the first time i encounter this and its really amzing i mean i alittle scary i guess....

Bipolar isn't the same as split personality. In this case, Sooha may have something like DID (Dissociative Identity Disorder) in which another personality is created in order to better deal with past trauma. Just to clarify!