Hagumi is a energetic third-year student at Hanasakigawa Girls' High School and the bassist of Hello, Happy World! Hagumi also has a older brother that taught her to play the bass a bit in the past, which made it easy. Hagumi has copper eyes and short, bright orange hair. Her bangs and forelocks frame her face, and has two long cowlick split at the center. She was born on July 30th, she is about 152 cm tall, and her position is a bassist. Her bass is a Rickenbacker 4003 Jetglo Black bass.