9tk9m, houshou marine, houshou marine (1st costume), hololive, hashtag-only commentary, highres, 1girl, adapted costume, animal ear hairband, animal ears, blue gemstone, breasts, fake animal ears, gem, hair ribbon, hairband, hetero, medium breasts, open mouth, rabbit ears, red eyes, red hair, red ribbon, ribbon, simple background, solo, teeth, two side up, virtual youtuber, white background, yellow eyes