1girl, arknights, bare_shoulders, bikini, breasts, detached_sleeves, hair_ornament, hair_rings, halterneck, horns, long_hair, long_sleeves, looking_at_viewer, lufi_ays, official_alternate_costume, purple_eyes, red_hair, solo, star_(symbol), star_hair_ornament, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, thigh_strap, very_long_hair