Strategic. Relentless. He's barely a human being. No sense of remorse or care. One track, one objective. Anyone in his way is dead. Quiet. When he does speak, he's known to toy with his victims in a sort of... rushed way. Like they're annoying him just by breathing. He's a ghost. He doesn't like it when people see him. High pain tolerance. High stamina. High weapon skill. He cares about nothing... except maybe his boots. Cold. Medical skills, likely ex-military.