Himuro, Maruko

Hakushu's manager, Himuro, is a serious-looking third-year student with short black hair. Himuro is Marco's inspiration for playing American football, for he became smitten with her in middle school and, in an apparent attempt to woo her, he vowed to show her "the morning sunshine after a victory" by winning the Christmas Bowl. She came to admire his optimism and ambition, and at some time afterward, the two were in a close relationship, though it is unclear how intimate they were. He now calls her by the nickname "Maria", which she dislikes. Because Himuro is two years Marco's senior, the player realized that his first year in high school would be his only chance to make good on his promise. After witnessing many players injured by Gao's strength, Himuro came to despise Marco's determination to win at any cost, and they grew apart, though she remains with the team.

(Source: Eyeshield 21 Wikia)