Mizuki Rygraden was the sister of Remulet Rygraden and the former 3rd seat of the 1st Division.
50 years ago, She was killed by Adelio Valdez while in a mission in Hueco Mundo.
She is a Soberano, unlike her brother, who is a Arrancar with Shinigami powers at 100%. She also reveals that Rygraden himself is a Soberano, although he never likes saying it.
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