Eternal Damnation Bleach fanfic Grimmjow x oc

She is a triumphant warrior with no mercy. He is a warrior under Aizen's rule. One day the two hot heads meet, she wants his life and he wants her as prisoner. Both taken back to Las Noches by Gin she is locked up but what does Aizen want with her and how did grimmjow get dragged into this?