1girl, 24kswj-shouwangjun, arknights, artist_name, bare_shoulders, braid, breasts, character_name, closed_mouth, dated, detached_sleeves, from_behind, grey_background, horns, long_hair, long_sleeves, looking_at_viewer, looking_back, medium_breasts, official_alternate_costume, purple_eyes, red_hair, simple_background, solo, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), upper_body