Sachiko Sakura

Sachiko Sakura (桜 沙知子, Sakura Sachiko) is a 42 year old female Yakuza crime boss who was indirectly involved with Minami Yamabuki's story as it was her who tasked Jin with targeting Manager's parents' warehouse and the adoptive mother of Sachiyo Sakura whom she found in Sachiyo's biological parents' apartment after they amassed a massive debt to her and abandoned Sachiyo as a result.

Chronology
Sachiko immediately discovered Sachiyo Sakura's power and adopted her, using her power to help grow her crime family. Over time, Sachiko developed a motherly bond with her and desired to keep her out of the underground world. After encountering Rokudou and falling victim to his spell effects, she extensively researched his power and easily figured out its mechanics as well as his history of using the power. Wanting Sachiyo to live a normal life, she intentionally made her attend Amori High as a means to achieve this and directly enlisted Rokudou's help to achieve this goal. Rokudou accepts her request to rehabilitate her daughter, but refuses her protection should Ranna ever go on a rampage. Grateful for his kindness, Sachiko still promises to intervene with Ranna once her daughter has been reformed.

Etymology

 * The name Sachiko means "sand" (沙) (sa), "knowledge" (知) (chi) and "generation" (代) (ko).
 * Sachiko's surname Sakura means "cherry blossom" (桜).