Mokuba is eternally devoted to his brother Seto Kaiba and is constantly by his side. He is more naive and good-natured, and will do whatever his brother tells him to. Indeed, Mokuba is perhaps the source of his brother's more human and positive traits, and Mokuba has acknowledged that to everyone else Kaiba can seem like an unpleasant person to be around but Mokuba recognizes the good in his brother and looks past Kaiba's flaws. He also seems to trust Yugi and his friends more than he did previously. There is a part in one episode when he saw Yami Yugi watching him from another building when he was about to kick some brothers out of the Battle City grounds, when he considered, "You know, I bet Yugi would give them another chance!", which shows that he must really respect Yugi, as he starts to want to think and be like him. Mokuba is a kind-hearted boy who is naive to the ways of the world but is also shown to be knowledgeable about computers, tech and at one point was aware of the company's stocks and devised a plan to help save KaibaCorp’s reputation. He succeeds in befriending Yugi and his friends, even though Kaiba doesn’t approve of this. Mokuba does not Duel in the first series anime. He only Duels in the second series and manga. Mokuba has an unlucky streak of being kidnapped by Kaiba's enemies, forcing Kaiba to show his kinder side and rescue him. Mokuba is the only person that his brother is shown to consistently care about, despite Mokuba snapping at him once.