Sachi

Sachi is an antagonist in Karma's route introduced in The Freaks.

She is the grand-niece of Makina, the daughter of school nurse Yoshie, the older twin sister of Sachiko, the second cousin once removed of twins Zeo and Elise Alucard.

Personality
Sachi is a completely malicious spirit. She envies Sachiko for being born and wreaks havoc just for her own amusement, much like her sister used to. Having no sense of right and wrong, she can't be reasoned with unlike with Sachiko, and she only acts according to her whim and emotions. She also speaks incoherently, at best being able to string together loosely related words, but mostly just speaking in growls and noises.

History
Sachi is the unborn older twin sister of Sachiko, a phenomenon called the vanishing twin, in which she died in utero of her mother and then completely reabsorbed by the other twin. However, when Sachiko absorbed Sachi, she tried to fight back by biting her, resulting in her two teeth getting lodged near her heart and Sachiko had to undergo a surgery to remove them.

Sachi's spiritual energy grows after Elise Alucard accidentally brought her teeth along with her when she returns to Nirvana.

Trivia

 * Sachi's name in Japanese is written with two hiragana characters, 'sa' (さ) and 'chi' (ち), which resemble and mirror each other, possibly to emphasize her identity as Sachiko's twin.