[Thankfully, Ori follows his lead on how this conversation needs to go from here on out. For his own peace of mind, it's easier to focus on the details than it is his feelings about them--or about her, for that matter.

Her first question is about what he expected. She has a sister with whom relations have totally deteriorated, so it makes sense that the detail she focuses in on is Kaeya. Sighing softly, he takes his usual seat across from her and runs his hands through his hair in vain attempt to get it out of his face.]

He was.

His name is Kaeya. My father adopted him into our family when we were both young, and we grew up together.

[He hesitates before getting into the details of how their relationship suddenly shattered. It's a secret he's kept these past four years, not breathing a word of it to anyone despite the fact that he really, really should for the good of Mondstadt. Even now, where the information means hardly anything, speaking of it feels like some sort of betrayal.

Which makes no sense, but his feelings often don't. Especially when it comes to his erstwhile brother.]

The day my father died, he told me he was planted in Mondstadt as a spy for his homeland. I... didn't take the news well.

[Which is a kind euphemism for "I nearly killed him."]