1girl, arms_up, blue_hair, day, fins, grey_eyes, hair_between_eyes, hair_censor, head_fins, koi, long_hair, looking_at_viewer, looking_to_the_side, mermaid, monster_girl, nail_polish, nude, outdoors, parted_lips, red_nails, signature, solo, sunlight, transparent, twintails, underwater, very_long_hair, water, , original, year_2020, 