Jonah tends to be quiet and rarely smiles, and it is unusual for him to laugh. Jonah has a maturity beyond his years, having a tendency to largely keep his thoughts to himself and not openly complain. He has a fear of needles. Like the other members of the squad, Jonah has also developed an eagerness to engage in battle when Koko turns them loose. Jonah has not displayed an interest in the opposite sex as he is still a preadolescent. Jonah is still an optimistic and caring person at heart. 