Places someone might find the character? Things they might be doing? Library, library, library. Also the training hall. And anywhere because of patrol and general curiosity.
Is the character in any IC group, including the school? Details! He is on the Defense Force and will possibly be in the vampire division? idk.
What kind of person does the character get along with? He likes other smart, educated types. He's interested in other people with lives like his slayers/hunters. He's protective of "normal" people.
Is there any type of CR you feel the character is missing (e.g. romantic interests, mentor figures, etc)? Well, he's got some allies and some enemies and some people he's protective of and a romantic interest, soooo...more of anything is good!
Other notes? Sam is a hunter. He hunts ghosts, demons, vampires, shapeshifters, ancient gods, and other supernatural type things. He's a smart guy who knows a lot about a lot. (More than me ;;;)