this is for any OCs! what body language is typical of your character? perhaps they're tense and closed, or free and poised?
Grim is VERY tense. He doesn't really look like it most of the time but he's tense 4 out of 5 times you see him. If you're very perceptive you might realize it but he's very anxious. He has a tick, he tugs at his gloves when anxious and/or annoyed !