Shiina Usami is Rentaro's 28th girlfriend from 100 Girlfriends franchise. She is an overjoyed girl who likes to blend in crowded places. She has autophobia which prevents her from doing solo activities (e.g. eating lunch at school and going to the bathroom by herself), but she just has to hold it in at the short time. She will panic and run away in tears if she feels lonely, much like a rabbit.
