An innocent young girl, full of curiosity, with a thirst for knowledge. Due to her innocent behavior, she appears younger than she really is and unlike the other clones, does not physically age. She is very technologically adept, able to take apart, fix, and invent many different things. Sachika's favourite food is fruit, she dislikes spicy dishes, and she's allergic to onions.
Sachika's surname, Hirasaka (比良坂) uses the kanji 比 "hi" meaning "compare", 良 "ra" meaning "good", and 坂 "saka" meaning "hill". Noteably, the Kanji of her surname are the same used Yomotsu Hirasaka (黄泉比良坂), the slope that leads to the entrance of Yomotsu-kuni or Yomi, the underworld in Japanese mythology. Her first name Sachika (サチか) is written in katakana so the kanji reading of her name is unknown.
Sachika wears a yellow-green thigh-length dress which has white pleats around the bust and hips. The dress has green ribbon straps with yellow piping, which connect on her back into a very large bow. It is fastened with pink buttons up the front. She wears a shoulder bag shaped like Mirai with a pink strap, and green sandles tied with a white ribbon. Underneath her clothing, she wears white and blue spotted underwear and a camisole.
- In the video game Danganronpa V3: Killing Harmony, Sachika and Yuma's costumes appear on mannequins inside Ultimate Cosplayer Tsumugi Shirogane's Research Lab. The Danganronpa series shares many of its development team with Zanki Zero.
|Clones||Haruto Higurashi • Mamoru Ichiyo • Minamo Setouchi • Rinko Susukino • Ryo Mikajime • Sachika Hirasaka • Yuma Mashiro • Zen Kubota|
|Extend TV||Mirai • Sho Terashima|