I have to wonder, does Kanji have schizophrenia? That's about the only thing I can figure out that would generate his dis-likeable, paranoid personality and possibly qualify as his 'disability'. I have to admit there is at least one good thing that comes from Kanji's rantings in Act 1.
On the Emi path, during the school festival, she pretty much hounds you about not eating fried food since it's bad for her health.
Since she does this pretty much using the whole 'cuteness and pouting' approach it leads to the main character eventually having this
thought that got quite a laugh out of me.
[i]My God, Kenji, if only you could see the conspiracy unfolding![/i]