1girl, animal_ears, breasts, closed_mouth, completely_nude, fingernails, fins, floating_hair, full_body, grey_background, hands_up, head_fins, long_hair, looking_at_viewer, medium_breasts, mermaid, monster_girl, navel, nude, original, red_eyes, red_hair, ruteko_(ruko220), sharp_fingernails, simple_background, solo, twitter_username