|Surname Name||Yamaguchi Yuki|
|Birthday (Age)||April 20th (n/a)|
|Type of Character||Side Cast|
|Height||5′ 9′′ (175cm)|
|Job(s)||Lurking around Old District|
Despite being Yumi's mother, their relationship is notably stained. Yuki left Yumi and her father when she was young, and apparently was addicted to drugs. Yumi was not aware about her living in Kumon-Mi until accidentally meeting her at the Tojo Ramen.
Yumi doesn't like her for leaving her alone with her dad.
Yakuza member, Yuki left Yumi and her father when Yumi was young.