1girl, arknights, armpits, arms_behind_head, arms_up, bikini, black_bikini, blue_sky, bow, breasts, cleavage, criss-cross_halter, day, detached_sleeves, from_side, hair_between_eyes, hair_tie_in_mouth, halterneck, hammock, horns, long_hair, long_sleeves, looking_at_viewer, medium_breasts, mouth_hold, navel, official_alternate_costume, outdoors, ponytail, purple_eyes, red_hair, see-through, side-tie_bikini_bottom, sidelocks, sky, solo, stomach, straight_hair, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, swimsuit_cover-up, thigh_bow, thigh_strap, three_twosix, tying, tying_hair, very_long_hair, white_bow