Rule 34 Dev - 1girl 2020s 2023 2d 2d_(artwork) abs anthro anthro_only armor armored_boots armored_gloves artist_name bikini bikini_armor black_bikini black_bikini_bottom black_bikini_top blue_background breasts clothed clothed_female clothing delta_rune_(emblem) digital_media_(artwork) ear_fins english_text eyepatch female_anthro female_only fins fish fish_girl gauntlets hair marine mekyo_(topotopo_0_0) monochrome monster monster_girl muscle muscular_anthro muscular_female navel non-mammal_breasts non-mammal_navel pauldrons revealing_clothes shield simple_background skimpy skimpy_outfit slit_pupils solid_color_background solo_anthro solo_female text thighs throwing throwing_object throwing_object_at_viewer throwing_shield twitter twitter_username undertale undertale_(series) undyne video_game_character video_games weapon white_background|1072590