1girl, arknights, arm_up, armpits, bikini, breasts, burnt_clothes, criss-cross_halter, demon_girl, demon_horns, detached_sleeves, hair_intakes, hair_ornament, hair_spread_out, halterneck, hammock, hand_in_own_hair, horns, kasasasagi, knee_up, lying, midriff, official_alternate_costume, on_side, red_hair, side-tie_bikini_bottom, star_(symbol), star_hair_ornament, string_bikini, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, swimsuit_cover-up, thigh_strap