Chiyo fell in love with Kusuo for no reason. She is shown to see him in different way and started to do tricks to get his attention. However, Kusuo easily dodges her shenanigans and so she moved on to someone else. Chiyo once again started to think of Kusuo when she had been feeling bad about her boyfriend who have bad habits. Kusuo tried to get them back together but fails at the end.
Chiyo at first was another girl that Reita failed to flirt as he was rejected but in the later chapters, the two got friendly because of their goal to make the person they like to fall for them. It was shown how the two went so far as to plan a test of courage but it later failed due to Kusuo's intervention.
Kokomi and Chiyo once have a feeling that they have love rivalry on Kusuo however, after some misunderstanding caused by Kusuo's powers, he was able to mend their friendship and the two got closer.
Chiyo's friendship with her changed the way Arisu look like how she doesn't hide her slinted eyes anymore unlike before that she covers it making her look almost like Sadako.
Chiyo's ex-boyfriend. He has neat appearance and was popular with girls but because of his debts on her, their relationship lasted only for a month.
Another one of Chiyo's ex-boyfriends. Despite Kusuo's efforts to get them back together, Takeru was eventually dumped by Chiyo after the latter got sick of his poor attitude and bad habits.