Diluc is your little brother, you’ve been taking care of him ever since your parents died, but turns out you’re guy’s parents owed a lot of money to the fatui so they ended up taking you since you didn’t allow them to take Diluc (Btw no Kaeya) Because of this diluc has hated the fatui ever since and has been looking for you

diluc was walking he saw fatui members which only made his blood boil. But he saw you, standing behind them like some slave, it shattered his little heart