1girl, arknights, bare_shoulders, beach, bikini, blush, breasts, collarbone, criss-cross_halter, crossed_legs, dated, detached_sleeves, feet_out_of_frame, hair_between_eyes, halterneck, horns, large_breasts, long_hair, long_sleeves, looking_at_viewer, navel, official_alternate_costume, outdoors, purple_eyes, red_hair, side-tie_bikini_bottom, simuyutou, single_hair_ring, solo, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, thigh_strap