come and feel the love (like a sinner)

"Diluc."

...

But Diluc barely registers him. He's a mess of scarlet hair and dark blood seeping through the gaps in his fingers, and Kaeya's intermingled thoughts all morph into a lone, wretched one.

He looks just like Crepus.

-

or, the one where a comrade - a brother once known - is slain.