1girl, arknights, bad_pixiv_id, bare_shoulders, bikini, black_bikini, black_choker, breasts, choker, cleavage, closed_mouth, detached_sleeves, hair_between_eyes, hand_up, horns, long_hair, long_sleeves, medium_breasts, pink_background, purple_eyes, red_hair, side-tie_bikini_bottom, sitting, solo, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, twilight_(cgkk4357), two-tone_background, very_long_hair, white_background, white_sleeves