1girl, arknights, back, blue_sky, bug, butterfly, cloud, day, demon_horns, dress, floating_hair, from_behind, hair_rings, horns, long_hair, long_sleeves, ocean, outdoors, red_hair, sky, solo, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), thigh_strap, wading, water, white_butterfly, white_dress, ziyue