tsubu (kappunioyu562), tsumugi kokage, vspo!, highres, 1girl, air bubble, alternate costume, black choker, blue eyes, blue hair, bubble, choker, creature, dress, feet out of frame, gradient hair, hair flaps, holding, holding creature, medium hair, multicolored hair, open mouth, outside border, pillarboxed, puffy short sleeves, puffy sleeves, reaching, short sleeves, solo, underwater, virtual youtuber, water drop hair ornament, white dress