Uiui commands the stage as vocalist and bassist of REIJINGSIGNAL, her bass guitar "Snow Wizard" echoing the frost-themed essence of her Ice Rabbit Myumon heritage. She sports light blue bobbed hair accented by a snowflake clip, golden yellow eyes, and a matching fluffy tail. Her ensemble blends dark and sky blue tones: a black top fastened with a sky blue ribbon, black shorts adorned with similar detailing, navy shoulder bracelets, and sturdy dark blue boots featuring sky blue highlights. A compact blue bag rests against her left hip, completing her tactical yet stylish look.

Alongside bandmates Rararin and Sumomone, Uiui contributes to REIJINGSIGNAL’s ambitious pursuit of musical supremacy—a shift from their earlier casual collaborations. While Rararin actively scouts recruits like Howan to reignite their collective drive, Uiui’s personal stance on these efforts remains enigmatic. The trio’s shared history of crafting songs purely for joy lingers as a subtle undercurrent in their current ambitions, though Uiui’s role beyond performance stays uncharted in documented accounts.