1girl, arknights, bare_legs, bare_shoulders, bikini, detached_sleeves, feet_out_of_frame, hair_spread_out, horns, long_hair, long_sleeves, looking_at_viewer, purple_eyes, red_hair, shikakrosho, solo, standing, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, thighs, very_long_hair