How Diluc would react to Kaeya's partners
Albedo || Would approve at first, then after getting to know Albedo better would start to feel very weirded out by the man. A little off put by the fact that he's Khaenri'ahn, but ultimately happy that Kaeya has someone he can be himself around
Dainsleif || Never liked the man when he was sitting in the corner of his tavern, likes him even less now. Happy for Kaeya, but worried Dainsleif may turn Kaeya against him.
Rosaria || Happy for them, really, Rosaria is reliable and has been there for his brother even when he couldn't. He just... really doesn't understand why they have to make out at the bar and talk loudly about their sex life.
Childe || No. No. NO. Kaeya is grounded, indefinitely, and never allowed to even LOOK outside ever again. Absolutely not. The Fatui?? A harbinger?? This idiotic maniac??? Hell no.
Zhongli || A respectable man, a little worried he was using Kaeya for his inheritance at first... but relieved to find out he was just a little forgetful. Can give his baby brother a good life and treat him right. On the hand, finding out this was the supposed dead archon Morax? He's not too happy. Hopes Kaeya knows what he's getting himself into and stalks them for a long time to ensure Zhongli isn't manipulating or controlling Kaeya.
Huffman || Why. Just... why. He's okay? Doesn't like that Mika has to take care of him when he decides to get blackout drunk at the tavern, but Kaeya is curving that behavior. Still, it's a little unnerving that of all the people in Teyvat, this is who he chooses.
