infection monitor (arknights), surtr (arknights), arknights, absurdres, highres, 1girl, ass, bare shoulders, black dress, black horns, black thighhighs, breasts, chest strap, cleavage, closed mouth, collar, demon, demon girl, demon horns, detached collar, dress, floating, giant, giant hand, grayson, hair between eyes, hair intakes, horns, jacket, large breasts, long hair, looking at viewer, orange background, parted lips, purple eyes, red hair, simple background, sitting, slit pupils, solo, spiked collar, spikes, surtr's golem (arknights), sword, thighhighs, upskirt, very long hair, weapon