si (arknights), arknights, arknights: endfield, absurdres, highres, 1girl, bare shoulders, black hair, blue eyes, blush, breasts, cleavage, closed mouth, colored extremities, cowboy shot, crossed arms, double bun, dress, elbow gloves, gloves, green gloves, green hair, hair bun, hair intakes, hairband, horns, long hair, looking at viewer, multicolored hair, pointy ears, simple background, sketch, smile, solo, streaked hair, very long hair, very low bun, white background, white dress, yuroe yurou