You will find a list of Avatars which are already used by In Play characters.
As we are allowing self made characters in addition to the characters belonging to the bleach universe, we listed all the used characters here, together with the Anime / Manga they belong to.
Original Name / Anime.............Bleach Character
Kujaku [RG Veda]..........................Henarion Kuchiki
Jushiro Ukitake [Bleach]..................Jushiro Ukitake