1girl, arknights, arturaxia, bare_shoulders, bikini, black_bikini, blush, breasts, cleavage, collarbone, detached_sleeves, horns, large_breasts, long_hair, long_sleeves, looking_at_viewer, navel, official_alternate_costume, purple_eyes, red_hair, solo, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, thighs, white_background