Hazīn- The reason he hypnotizes people is because he feels nobody would ever accept him otherwise. he has along history of being bullied. He does, in fact, care about Zeke. He will do his best to protect her.
Serena- She always has a calm demeanor, but she hates people who claim to help others but really don't. Especially if they call themselves a hospital. She would never harm someone, she would sooner kill herself than hurt someone
Ghost- Hates attaching himself to others and is trapped in a mental cage of the mistress of shadow's making. He truly is not a bad person, but he does what he has to so he doesn't have to go through more pain.
These are the ones off of the top of my mind, give the name of any other oc and I will give their weakness