BL

Laena Ukitake is the daughter of the 13th division Captain Jushiro Ukitake, Jushiro wanted to protect his daughter Laena from those with ulterior motives because she can see other people's Zanpakuto spirits without entering their wielder's inner world. So Jushiro Ukitake decided to arranged marriage with Byakuya Kuchiki, Byakuya accepted the marriage.