[Not totally familiar, Byakuya. But close enough. She doesn't particularly care. Allies are allies.]

I don't know the name. An arrancar? That would put it after when I arrived, since you were not there yet last I remember... Rukia, as she is here, is from before these events. Long before. She hasn't even rejoined the fight yet.

Bykauya-sama, if you know of the battle she and I fought there, please do not tell her. I have not yet, I am waiting for a good time. But please leave it to me.

[She's very serious about this. She respects you, even if she's still annoyed with you over a few things, but Rukia's well being, mental especially at the current moment, far outweighs that.]