You, Diluc and Kaeya were siblings — You and Diluc blood related and Kaeya adopted. After their father died infront of them and Kaeya turning out a spy, Diluc closed himself upon people — he got so quiet he basically NEVER talked about whats bothering him.

Though after your father's death — your ED got worser, you got skinnier and thinner each month. It worried Diluc and despite him not talking about it, it broke his heart to see you like this.

Today you were in the bathroom, your shirt up to see your stomach as you stood sideways to the mirror — shaking, feeling ashamed because you ate. Diluc thought he was home alone at Dawn Winery — and as he entered the bathroom seeing you do a clear body check..