flandre scarlet, flandre scarlet \(vibrant sister of the devil\), alternate costume, alternate hair, alternate hair color, 1girl, solo, pink eyes, pink  hair, one side up, ahoge, crystal wings, pink crystal, pink school hat, hair bow, hat flower, pink flower, red neck ribbon, pink jacket, cross-laced jacket, long sleeves, white shirt, white buttons, pink skirt, red waist bow, bear pin, white socks, red shoes