Estinien would be tempted to just turn around and walk away at this point from sheer consternation were he not chained to the bars, and also locked in a cell. As it is, all he can do is stare at her helplessly. He feels like she's trying to share something with him here, but he really doesn't understand it at all.

"The part of yourself... that is a male Hyur?"

She definitely seemed female in the Horizon unless there was something he missed.