Board Thread:Manga Discussion/@comment-28702329-20180621120402/@comment-35564842-20190505181225

No he isn’t insane

He is very aware of his actions and he never shows any signs of split personality disorder. Are you talking about Kosaku? Because that is just a guy Kira stole the identity of to stay hidden, he doesn’t actually think he is Kosaku nor does he act like him

Also having a mental illness doesn’t automatically mean that you’re insane.