Chris's second partner. She was teamed up with him because there was an odd number of girls to boys even though he was already partners with Alice. Sana hopes to become a doctor someday but can't afford a good high school to attend so she becomes a scholarship student at Nihon Daiichi Gakuen. She puts up with training for naked week knowing it's her only hope of becoming a doctor but she's extremely embarrassed by it. She has the largest breasts in her class which just brings her embarrassment.