Sumomone is a member of the peach flying squirrel race, standing 160cm tall with pink curly hair, turquoise eyes, and a pink fluffy tail. She serves as vocalist and guitarist for REIJINGSIGNAL, playing an instrument called "Grief Priest". Her typical attire includes a dark purple top featuring a hot pink ribbon, a matching miniskirt with pink frills, shoulder bracelets, gloves decorated with hot pink bows, a crown accented with pink details, striped stockings in hot pink and purple, and hot pink flat low-heeled shoes.

Raised by a former actress mother, Sumomone was immersed in the performing arts from a young age, leading to proficiency in attracting attention, especially from the opposite sex. She positions herself as specializing in "sexy healing," deliberately wielding her charms as a calculated tactic. Her personality incorporates a teasing, impish streak, often engaging in behaviors aimed at manipulating others through her perceived appeal; she expresses enjoyment in exerting control using her attractiveness. However, she currently lacks comprehension of genuine love or true emotional connection.

Her REIJINGSIGNAL bandmates are Rararin and Uiui, with Uiui frequently teasing her. Outside the band, she has worked part-time at a maid café. Her personal interests focus on self-improvement and cultivating an appearance she perceives as both cute and sexy. While omnivorous, she actively avoids excessively spicy foods. Her character song is "Plastic / Jewelty Tune".