|Class and Year||1-F|
|Physical and Vital Statistics|
|Manga||Volume 1 Chapter 1|
Kikuno Shoukanji 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.
When it comes to Souta, she is immensely attached to him even threatening those who would do something to cause her not to see him. She has declared Souta as both her brother and the boy she likes, which showcases her fixation on him.
She is the childhood best friend of Souta. They were pretty close and Kikuno even cleaned Souta's ears.
At some point, they were separated as his family moved away. In the ensuing years, she met and befriended Rin Eiyuuzaki who she told of her association with Souta (unaware the latter knew him as well).
Because she was studying overseas, she missed many days and would have to repeat her first year in the school before she was reunited with Souta. She caught up with him and befriended his new associates Nanami Knight Bladefield and Akane Mahougasawa.