Ah, that's a trickier question.

[A shrug of his shoulders and he spreads his hands.] I wouldn't really know.

[Like it's not a big deal or anything.] My father disappeared when I was a child. I was brought up by Diluc's family, so I don't know too much of my family's history.

[You know, except for the fact that many people of his destroyed homeland are cursed and corrupted and turn into monsters. Minor details. Kaeya seems to have mostly dodged that at least.]