harmonie (arknights), arknights, highres, 1girl, animal ear fluff, animal ears, armband, black socks, cardigan, cat ears, cat girl, cat tail, green eyes, green hair, green tail, grey cardigan, grey socks, hands on own cheeks, hands on own face, hood, hoodie, looking at viewer, lying, no shoes, okura 0915, on stomach, simple background, socks, solo, tail, tail ornament, tail ring, white background, white hoodie