Leader, bassist, and vocalist of the popular band SICK HACK. She handles both songwriting and composition. She drinks constantly to distract herself from daily anxiety and stress, so she is almost always drunk. She is quite slovenly and owes money to everyone. She addresses SICK HACK members without honorifics and SIDEROS members with "-chan."

The drummer for SICK HACK. An androgynous woman. She has a serious and reliable personality, earning her the respect of those around her. Her main source of stress is cleaning up after Kikuri's constant blunders and problems. She addresses SICK HACK members without honorifics.

The guitarist for SICK HACK. She has a bright personality and listens to anime songs frequently. She came from the UK because she loves anime and wanted to attend "Comima." She speaks with a slight accent. She addresses SICK HACK members without honorifics.

Leader, guitarist, and vocalist of the girl band SIDEROS. A 17-year-old high school sophomore. She looks up to Kikuri Hiroi, calling her "Big Sis." She uses a harsh tone to avoid being looked down upon, which often leads to misunderstandings. In short, she is a tsundere.

The drummer for SIDEROS. A 16-year-old high school freshman. She has a polite personality and uses formal speech with everyone, ending her sentences with "-ssu." She is surprisingly the most sensible person in the group. Her hobby is gaming. She calls Yoyoko "Senpai" and addresses other SIDEROS members with "-chan."

The lead guitarist for SIDEROS. A 16-year-old high school freshman. She has a soft, gentle personality. Her specialty is making sweets. She loves reading shojo manga and has a huge weakness for anything romantic.

The bassist for SIDEROS. A 16-year-old high school freshman. She wears Gothic Lolita clothing and claims to have spiritual sensitivity due to her love for the paranormal. She has low blood pressure and a downer personality. She harbors an obsessive infatuation with the protagonist. She refers to herself in the third person as "Yuyu."

The manager of Shinjuku FOLT. A man who identifies as an "onee" (effeminate/queer). Despite his flamboyant speech, his kind personality makes him well-loved by everyone. He is knowledgeable about makeup and fashion. Kikuri calls him "Gin-chan," while others call him "Manager."