An 'unstable' skeleton, his own brother refers to him as 'nuts' due to his energetic yet dangerous demeanor. He has a common habit of swearing... without using swears ("FOR HECK'S SAKE!"). He is depicted as aggressive, stern, and mostly no-nonsense. Popular fandom interpretation shows him as also being snarky. His brother shows quieter tendencies and it's assumed that BlackBerry uses this to his advantage.