pekopeco, nightmare (arknights), nightmare (light and shadow) (arknights), arknights, highres, 1girl, animal ear fluff, animal ears, bare shoulders, black dress, black hat, blonde hair, blue eyes, closed mouth, collarbone, dress, eyes visible through hair, flower, frilled hat, frills, gloves, hair ornament, hairclip, hat, heterochromia, holding, holding flower, light smile, long hair, looking at viewer, off shoulder, official alternate costume, own hands together, ribbon, simple background, solo, very long hair, white background, white gloves, yellow eyes, yellow flower, yellow ribbon