Hotaru is a sixteen-year-old ultimate student studying at Prowess Academy. She was scouted from her old school and came to the Academy in her Freshman year, and has been attending ever since. However, this is the first time a killing game has taken place here. She has spiky red hair with an undercut, several facial piercings, pale skin, and bright blue eyes. She is 5'8" and 165 lbs. She is rather muscular.

Her voice is chipper and upbeat most of the time, as she tends to be rather positive. However, she is prone to anxiety attacks, and her voice can become shaky when worried, frightened, or sad. She has a slight tendency to yell like her dad Mondo when flustered. She is the protagonist of the game, so there will be lots of lines for her!