|Class and Year||1-F|
|Physical and Vital Statistics|
|Manga||Volume 1 Chapter 1|
Kikuno is Souta's childhood best friend who likes to act as an older sister to him, and does not relent in doing so for anything, demonstrated by her "sibling love" flag's ability to dodge any attempt Souta makes to break it.
She has an energetic personality, as seen when she jumped on Souta when he was first introduced in the class, but after Souta asked if she got heavier she got depressed immediately.
She is the childhood best friend of Souta. They were pretty close and Kikuno even cleaned Souta's ears.