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Yuina's childhood friend. She makes a contract with Lucifer so that she can fight with Yuina. She is frustrated by what she perceives as Yuina throwing away her singing talents.

Yuuka Morigaki is a first-year student at Kentani High School in Hyougo Prefecture and a supporting character in the spin-off manga "Saki: Achiga-hen episode of side-A".

Himeko Tsuruta is a second-year student at Shindouji Girls' High School. She has been together with Mairu since middle school. She is the shy type personality person and always cares for her team members especially Mairu, due to their strong bond in friendship. Her ability is to linked with Mairu. Mairu has the option to impose a Han restriction (eg. 2 Han or 3 Han) on herself the moment she opens her hand, if she wins with that hand then Himeko will win that same round with double that amount (eg. 4 Han or 6 Han, respectively). This Han restriction is not limited to Yaku, dora can also be used to elevate her Han values. If she doesn't win then Himeko will almost never win; though, in the rare…

Дворецкий Коромо Амаэ.

Hatsuse Okahashi is a first-year student at Bansei High School and a supporting character of the spin-off manga "Saki Achiga-hen episode of side-A". She is a former member of Ada Middle School's mahjong club with Ako Atarashi. Hatsuse is an admirer her senior Yae Kobashiri in Bansei's mahjong club.

Женщина, воспитавшая Юдзу и приведшая её в Конохана-тэй. Является служительницей храма.

Одноклассница Миши. Постоянно соперничает с ней за внимание в классе, но при этом является её подругой.