Given the pet name "Ika," Tsukasa is an honor student described as being capable of accomplishing anything to which she puts her mind. She is said to be gifted with both intelligence and beauty, but she became obsessed a brilliant student outshining even her, Akiha Tohno. After the incident in the story is resolved, she cannot stop herself from quivering in Akiha's presence, but she is able to resist the urge to run away by doing her best to muster up her courage.
Tsukasa, due to her obsession with Akiha, seeks to make her disappear. She tries to use one of the rumored Seven Curses of Asagami, involving postal boxes, and gets nervous when Akiha does not disappear as it means the wish will be reversed to her within a week's time. As a result, she panics, and attempts to kill Akiha to fulfill the wish so as to save her own life, only to be knocked unconscious by Akiha instead.
Nasu thinks due to "perhaps because her timidity and feeling of being cornered were pretty cute, very few players actually ended up disliking her."
- ↑ 1.0 1.1
 Tsukihime Dokuhon PlusPeriod - TSUKIHIME Dictionary: Shijyou Tsukasa [Person's name], p.180
Tsukasa Shijyou [Person's name]
A student at the Asagami Academy for Girls. Her pet name is "Ika".
She was an honor student gifted with both intelligence and beauty, capable of accomplishing anything she put her mind to. However, she fell into the grips of obsession with the appearance of the brilliant Tohno Akiha, who outshone even her.
She appears in one of the side stories in Kagetsu Tohya. Perhaps because her timidity and feeling of being cornered were pretty cute, very few players actually ended up disliking her.
Also, she still couldn't stop herself from quivering in Akiha's presence even after the incident was resolved, but she did her best to muster her courage and resist the urge to run away.
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