Genki Ueda 上田元気

Udea Genki is a big and powerful man who can be a deadly warrior when he is needed. He seems to live, train, and study at Ogami General Hospital, although his reasons for being there are never actually known. He may be there just to help with Nanako's strength training. Genki is a very kind and friendly man and tries to make sure that Nanako is always ok.