Just when I thought I knew the real deal, Wiki changes on me, yet again.
Anyway, ネル トゥ has the ability to swallow cero attacks and, in her adult form, fire them back with her own cero. Her released form, which is achieved by manifesting with her zanpakuto Gamuza, is that of an ibex-like centaur with long, curved horns, a thick tail, and an armor covering her shoulders and hands. Her zanpakuto also changes into a white, double-ended lance, making her appear as a medieval knight or jouster.
Pretty daring cosplay, and she certainly has the look for it. Thanks to Shiro-kun for sending this in! Too bad there's only a small version of this photo.