-He is insane. How do I incorporate that into his character?

1. man-vs-self
He is his own antagonist. He goes against himself. He is both the hero and the villain of his story.

2. He affects other characters. (How can I use this?)

3. He is driven by obsession. Of what exactly?

3a. Rule the world?

3b. Destroying his enemies?

3c. To make laughter?

3d. All of the above?

4. He knows when something isn't right.

4a. As he is mentally disabled would genjutsu be his weakness or strength?

5. He has to show symptoms of a real mental illness.

5a. Do research on this illness so that readers won't be offended.

6. He has behavior quirks.

6a. Scarring himself to instill fear?

6b. Inappropriate emotions at the wrong time?

6c. Rapid changing moods?

6d. Childlike Playfulness; immaturity.

7. Ignoring primal urges

7a. No sleeping, eating, drinking or anything else until he wants to? More research is required.

8. Backstory

8a. Easy, just look for his decent of madness. (Title name?)

9. The snap. Where he explains how fucked up his life was to turn him insane.