Rule 34 Dev - 1girl animal_ears casual collarbone earrings fingernails gogat8 hair_between_eyes hair_ornament horse_ears horse_girl horse_tail jewelry long_hair looking_at_viewer mole mole_under_eye navel open_mouth purple_eyes simple_background single_earring sitting solo tail twintails umamusume vivlos_(umamusume) white_background|23637183453