Tatsumi is well-spoken, and often makes references to the Bible when he speaks. Much of his advice is religion-based. When faced with what he perceives to be a problem, he tends to spring into action before assessing the situation, attempting to help without knowing the full story. Sometimes, he makes assumptions about these situations that turn out to be untrue, and tries to fix a problem that isn't present at all. He seems to worry quite a bit, but he tries not to let his fears hold him back.