Rule 34 Dev - 1girl 2020s 2022 2d 2d_(artwork) anthro anthro_only armor armored_boots armored_gloves artist_name bikini_armor black_legwear black_stockings black_thighhighs blue_background blue_body blue_skin breasts cleavage clothed clothed_female clothing delta_rune_(emblem) digital_media_(artwork) ear_fins eyepatch female_anthro female_only fins fish fish_girl full_body gauntlets hair holding_shield holding_spear holding_weapon legwear long_hair marine mekyo_(topotopo_0_0) monster monster_girl navel navel_cutout non-mammal_breasts non-mammal_navel pauldrons ponytail red_hair red_ponytail revealing_clothes shield simple_background skimpy skimpy_outfit slit_pupils solo_anthro solo_female spear stockings thighhighs twitter twitter_username undertale undertale_(series) undyne video_game_character video_games weapon yellow_sclera|1072315