takafuji aya, theresa (arknights), arknights, official art, 1girl, anime coloring, black boots, black horns, black pantyhose, boots, breasts, closed mouth, collared dress, dress, full body, grey hair, hair between eyes, high heel boots, high heels, horns, jewelry, long hair, long sleeves, looking at viewer, medium breasts, multicolored hair, open hands, pantyhose, pink eyes, pink hair, ring, simple background, single sidelock, solo, standing, torn clothes, torn dress, transparent background, two-tone dress, two-tone hair, very long hair, white dress