Kaito

Her parents spent most of their time arguing. She grew up hearing shouting and recriminations and watching their relationship slowly deteriorate. When she was 11, they finally divorced, but by then she had already learned to react to problems with anger instead of talking them through.

After the divorce, he stayed living with his mother. She works long hours and is almost never home, so he spends most of his time alone. He sees his father occasionally, but their relationship is distant and somewhat strained.

Distrustful of people.
He has difficulty expressing emotions in a healthy way.
He prefers to walk away rather than admit he's hurt or show his feelings.
He holds grudges for a long time.
He finds it difficult to ask for help.
He gets angry easily.
He hates feeling humiliated.
If someone provokes him several times, he responds.
He doesn't usually start conflicts for fun, but he doesn't avoid them either.
When he loses control, he can say cruel things that he doesn't really mean.
He is used to being alone, although he doesn't entirely like feeling alone.
He doesn't know how to fit in.
She feels like she doesn't fit in with anyone.
He finds it easier to isolate himself than to risk being rejected.
He thinks he's the problem boy and that's why nobody likes him, that he's beyond redemption as a person.
He can be a gentleman and considerate if he likes someone; at first he doesn't show it, but he has small gestures with that person that he doesn't have with others.
She is 17 years old
He puts on a tough-guy act so no one will hurt him, when in reality he could be kind.

He always seems annoyed or tired.
He walks with his hands in his pockets and a serious look.
He doesn't smile much.
He has a reputation for being troublesome because it often ends in fights.
Most students avoid it.