When Mob was a child he learned that his emotions are linked to his psychic powers, and that strong negative emotions will cause him to hurt others. He generally tries to keep his emotions in check, as he dislikes hurting others. He is morally opposed to using psychic powers to hurt others, and will try to stop others from doing so.
He is kind, helpful and forgiving, but when his negative emotions reach sufficient levels, they will blot out all others and unleash his full power.
He is socially awkward, as he has spent most of his life trying not to interact with strangers for fear of hurting them.