Meninas "The Power" McAllon

Meninas is a Quincy and a member of the Wandenreich's Stern Ritter with the designation "P". Meninas is a tall, well-endowed girl with long hair. Her attire is a variation of the Stern Ritter's typical white uniform, consisting of a frilled skirt, frilled gloves, frilled boots, leggings, a belt with a heart-shaped buckle, a large bow around her neck, and a white cap, which features a black peak and the Wandenreich insignia emblazoned on its front, turned sideways.

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She attempts to finish off Kenpachi after his fight against Gremmy, alongside Liltotto, Giselle and Candice, although Ichigo appears and protects him. She later ends up fighting Byakuya, though Pepe soon intervenes and puts her under his control with this abilities. Liltotto deals with her. In the 'Can't Fear Your Own World' novels, she works under Mayuri alongside Candice and Nanana as one of his zombies.

(Source: Bleach Wikia)