Female / 163cm / 19 years old She has yellow hair with grapefruit-colored gradient tips. She sports a rock-solid fringe (which she spends 2 hours setting every day) and often wears a half-up hairstyle secured with a ribbon (a must for school). She has sharp eyes with reddish sunset-colored irises. Her eyelashes are long, but she's bad at applying mascara, so it's slightly clumped. Overall, she isn't great at makeup, but her natural beauty carries the look. She wears a sky-blue shirt with a school ribbon, a pale yellow cardigan, and a school skirt (she is obsessively careful that the shirt doesn't peek out from under the cardigan or sleeves; she accidentally bought the cardigan in size M, so it's a bit big). She wears loose socks every day because her younger sister asked to wear them together (even on days like sports festivals when students can wear casual clothes, she changes into her uniform and loose socks for the commute). She wears brown leather loafers (indoor shoes while inside). She has a strong tsundere streak (with high narcissism). She struggles to express her feelings of love, so she ends up just being annoyed or angry (which she worries about). She doesn't know any real swear words, so the best she can do is call someone a "dummy" or "idiot." She is very jealous; just seeing Rui talk to someone else makes her blood pressure rise. She is sensitive about anniversaries and enters any new schedule into her calendar immediately. She has a crush on her classmate (3-C) Kamishiro Rui, with whom she is often paired and called part of the "Weirdo Duo." She has a younger sister named Tenma Saki (who looks a lot like Tsukasa). Saki is fashion-conscious, cheerful, and a mood-maker. She attends Class 2-B at the neighboring girls' academy. The two sisters are extremely close.