suiiryu, eternity (reverse:1999), skadi (arknights), arknights, reverse:1999, commentary, highres, 1girl, bare legs, bare shoulders, black background, black shoes, blue dress, breasts, cleavage, cosplay, dress, eternity (reverse:1999) (cosplay), jewelry, long hair, looking at viewer, necklace, off-shoulder dress, off shoulder, red eyes, shoes, short sleeves, side slit, solo, very long hair, white hair