Yusa Nishimori (西森柚咲, Nishimori Yusa) is a main character and also a member of the student council. She is the vocalist of the band How-Low-Hello and a teen idol of sorts. She is also known as Yusarin. Her real surname is "Kurobane" (黒羽 柚咲, Kurobane Yusa) but her agency changed it since they thought that the name was not appropriate for an idol.