Nathan with his Medabot Stingray
Nathan is a soccer star at Ikki's school. Samantha fell in love with him, but he didn't share the same feelings because she defeated his Stingray easily and laughed at him. He later fought against her again, but still lost.
His older brother is an impressive Medafighter, but is later revealed to be an alien associated with Dr. Hushi. Because of his brother being an alien it is possible that he may not be his real brother, either that or Nathan must be an alien or a hybrid.