Keiko Sanjō (三条 京子, Sanjo Keiko) is one of the supporting character of Inari, Konkon, Koi Iroha series.
She is one of Inari's best friends and a very boyish girl who feels protective of her friends. She has known Inari since elementary school and cares for her tremendously. She learns of Akemi's feelings for her after eavesdropping on her turning down another boy, and has since become conflicted on how to respond.
Sanjo has slate blue hair kept short and boyish, matching her eye color. She is mostly seen wearing her uniform.
- The name Keiko means "capital city" (京) (kei) and child"" (子) (ko).
- Keiko's surname Sanjo means "three" (三) (san) and "article" (条) (jo).