Kanae was a Gemischt (Mixed-Blooded) Quincy and a former maid in the service of Ishida family.

As a loyal maid, Katagiri is a very polite and well-mannered person. She addresses Ryūken Ishida as "young master" and patiently listens to his thoughts and problems. She's aware of the responsibilities which weigh on Ryūken's shoulders as an Echt (Pure-Blooded) Quincy and she's always ready to offer him advice. She is very attached to Ryūken, being his protector, and she can't bear to see him sad.

(Source: Bleach Wiki)