1girl, arknights, bare_shoulders, bikini, blue_sky, day, detached_sleeves, dutch_angle, horns, leaning_forward, long_hair, long_sleeves, official_alternate_costume, outdoors, purple_eyes, red_hair, roupo99, sky, solo, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, thigh_strap, thighs, very_long_hair, wading, water