Nasa Yuzaki's wife. She saved Nasa from getting hit by a truck during a snowy night, and he confessed to her at that moment, taken aback by her beauty. Tsukasa agreed to go out with Nasa on the condition that they get married.

Not much is known about Tsukasa's past. She has a strong love for movies, otaku culture, and of course her husband. Her maiden name is Tsukuyomi (月読).