Paramia, Roka

ロカ・パラミア

Before becoming a Números, Roka was a white, spider-like Adjuchas Hollow, created by Szayelaporro Granz through his successful experiments in producing artificial Menos. Roughly 250 years prior to her transformation into an Arrancar, Szayelaporro dispatched Roka to the Rukongai along with several weaker Hollows, tasking her with observing Shinigami in combat.
During the Arrancar arc, while fulfilling her duties as a nurse in Las Noches, Roka reattaches Yammy Llargo's severed arm.
Trivia: Tite Kubo does not name this character in the manga or databooks, nor is she named in the anime. The name Roka Paramia originates from the novel Bleach: Spirits Are Forever With You by Ryougo Narita.