Tsukuyo Amane

Tsukuyo is the twin sister of Tsukasa Amane. She grew up with her mother and grandmother, forced to work hard in various school club activities and other practices. 

One day as she was beginning preparations for her koto club’s cultural festival stand, Mifuyu Azusa walks in and asks how Tsukuyo is doing. Tsukuyo explains she still has brushwork practice, dance lessons, and koto practice. The calligraphy club had just asked for her help and the dance association called her as well. Mifuyu wonders aloud why Tsukuyo doesn’t turn some of them down and that she shouldn’t overwork herself or she’d collapse. But her grandmother would be angry if she collapsed and, later that day, wouldn’t even allow Tsukuyo a break so she could test her on a recipe she had just learned. 

When everything becomes too overwhelming for her, she goes to a shrine to play her flute. One night she saw a person who looked just like her. The sight of that girl affected Tsukuyo so much it began to affect her koto playing and her other activities. Mifuyu asks what is going on with Tsukuyo, who tells her about the apparition she saw at the shrine. MIfuyu bursts out laughing, and encourages Tsukuyo to investigate. 

Tsukuyo does just that and that night she runs into the girl who looks identical to her. They both start talking at the same time, and then she introduces herself as Tsukasa Amane. As they talk, they discover they were both named at the shrine and both play the flute. After examining the flutes and thinking of their names, they come to the conclusion that they must be twin sisters. 

Tsukasa’s father came from the poorer artisan ward whereas her mother came from the richer Mizuna ward. Due to their class differences, their marriage ended up falling apart and the two girls were split between their parents with the mother changing her last name. Thereafter the two girls began to hang out everyday together since neither of them had any real friends due to their after-school activities. But the more time they spent together, the more differences they noticed and the girls began to bicker. Eventually they had a large argument and decided to part ways.

After a particularly difficult day at home where she lashed out at her grandmother, telling her she’s an Amane and not an Akidzuki or her doll. She suddenly felt dizzy and passed out. She wakes up in the hospital where Mifuyu tells her the doctors believe she passed out from stress. She then makes a call and leaves the room. Tsukasa walks over to Tsukuyo’s room and apologizes. The two girls accepted each other once more, but they were worried they would fight again like their parents due to their difference. Kyubey appeared and offered them a contract. Both girls wished to never hate each other and they’ve been almost inseparable ever since.