Ako Udagawa stands 148 cm tall, her petite frame accentuated by long light-purple hair cascading in curled pigtails, matching forelocks, and straightened bangs. Her large, piercing crimson eyes and occasional fang-like tooth add striking contrast. Her wardrobe blends punk and gothic aesthetics with playful charm.

A second-year student at Haneoka Girls’ High School and the adoring younger sister of Afterglow’s Tomoe Udagawa, Ako took up drumming after being captivated by her sister’s cool stage presence. She shares a cherished bond with Rinko Shirokane, nicknamed “Rin-rin,” and idolizes Roselia’s Yukina Minato, striving to refine her drumming to match her idol’s intensity. Her speech peppers with quirky phrases inspired by online gaming.

Embracing *chuunibyou* tendencies, Ako playfully indulges in delusions of grandeur and mystical alter egos while retaining self-awareness. Though cheerful and boisterous, her lively antics often position her as the group’s honorary kid sister, despite minimal age gaps. Driven and dedicated to her craft, she battles occasional self-doubt regarding her musical growth.

Thriving as Roselia’s drummer, she commands a DW Collector Series: Pure Maple five-piece kit. Key relationships include her sister Tomoe, confidante Rinko, and bandmates, with Yukina as her aspirational figure.

Born July 3 under Cancer, Ako favors potato chips and jelly beans but recoils at sea cucumbers, eggs, and bell peppers.