1girl absurdres animal antenna_hair blonde_hair blunt_bangs boots breasts cleavage cloud covered_navel drill_hair extra_arms fang fantasia_re:build fish frederika_(hitsugi_no_chaika) highres hitsugi_no_chaika holding holding_animal holding_fish long_hair mecha_musume mechanical_arms medium_breasts official_art one-piece_swimsuit open_mouth red_eyes sky smile solo sunlight swimsuit thigh_boots thighhighs third-party_source very_long_hair water