[He understands the feeling of familial loss quite well, but Aether's relationship with his sister is a touch different. They're so close, after all. Diluc can imagine the two of them were nigh inseparable from the way he speaks of her. He and Kaeya had always been close, but never to such a degree.

Diluc parts from their hug after a time, but he doesn't go far, picking up the hairbrush and motioning for Aether to turn around. He did say he'd help him with his hair, after all.]

That's a good attitude. I believe you'll meet her again as well, and when you do, you've got allies in your corner who will help you no matter what may happen.

[If his sister is in need of rescuing, Aether has a great many friends to help him in his efforts.]