endministrator (arknights), male endministrator (arknights), si (arknights), arknights, arknights: endfield, ore no imouto ga konna ni kawaii wake ga nai, highres, 1boy, 1girl, ahoge, bare shoulders, black gloves, black hair, blue eyes, blush, breasts, closed mouth, coat, colored extremities, crossed arms, dress, gloves, green hair, hair bun, long hair, looking at viewer, pointy ears, shidoufu, simple background, white background, white dress