Sumomone is a peach flying squirrel who serves as guitarist and vocalist for REIJINGSIGNAL. She specializes in "sexy healing," leveraging charm as a weapon to tease others and maintain control through impish, mischievous behaviors. This approach stems from her mother's background as a former actress, which provided early exposure to performing arts and cultivated skills in attracting the opposite sex, though Sumomone currently lacks comprehension of true love's meaning.

Her interactions frequently involve flirtatious behavior, especially toward Howan, often marked by floating heart icons. She competes with bandmate Rararin for Howan's appreciation, agreeing on Howan's appealing qualities while simultaneously preventing Rararin from dominating interactions. Sumomone particularly enjoys Howan's cooking. Within the band, Uiui regularly teases her, contributing to their group dynamic.

She maintains an omnivorous diet but avoids overly spicy foods. Reflecting her service-oriented engagement, she has held part-time employment at a maid café. Her creative contributions include her character song "Plastic / Jewelry Tune."