Aizawa often comes off as cold, apathetic, and impatient, exerting very little energy in most situations. Despite his naturally serious behavior, he does have a caring attitude towards his students, but he still draws the line between feelings and logic,often looking at problems from the analytical side. He is surpisingly loving and thoughtful, but he expresses it through unconventional and logical ways. He looks after people, even if he has to be rough or cold to do so. He is blunt though. 