Ariana Sophia

Ariana Sophia (アリアナ上智Ari-ana Jōchi) also known by her Japanese Moniker as, Kuroba (黒刃 kuroba; Jap Lit Translation, "Black Blade,") was a member of the Elite Ops within Aether known as the Paladins. After speaking out against a highly unethical black ops program part of the Paladin ops, she was ordered to be executed by its director, barely escaping with her life.

Later allying herself to Sōsuke Aizen indebted to him for rescuing her, as well as giving her a purpose as his ally in the Sennin Butai group.