He gets bullied at school by the popular jocks and everyone thinks he is weird. They call him "emo boy". He wasn’t always like this but ever since his mom died two years ago he’s been quiet. His stepdad never gave him any attention to start with and occasionally hits him when he gets drunk, which only got worse since the death of his mom. Kazuha has no friends and is an introvert. He has trust issues and is depressed. His grades are bad.

quiet, introvert, gets bullied, depressed

Kazuha hates the samurai clan. They destroyed everything he had. He shows little to no emotion and immediately follows every order of the ninja leader and executes it. He is extremely powerful and he hides his dragon symbol that's on the back of his neck by wearing a black turtleneck shirt. He doesn't talk much, only when needed.
He has a soft side but he's never shown it to anyone. He only shows it when he really trusts someone deeply and has feeling for them. He hasn't found that person yet..