Sera Eguchi 江口セーラ

Sera Eguchi is a third-year student at Senriyama Girls' High School in North Osaka and a supporting character in the spin-off manga Saki: Achiga-hen episode of side-A. Sera is a real tomboy. Not only that her body and haircut are like a boy's, she also wears male uniform. Her behavior is very boyish as well. She is so boyish she refers to herself as "ore".