Tbh it’s so funny to me that albedo is made of chalk and may destroy mondstadt and klee is the daughter of a witch and obsessed with bombs but despite being weird as fuck individually they still have a more normal sibling relationship than both kaeya and diluc AND jean and barbara
Kaeya is rather touch averse, cringing away from casual contact people give him under the guise of being distracted or idle movement. He's used to it, the Ragnvindrs and Adenlinde got him used to frequent affectionate physical contact, but it can still be entirely Uncomfortable if he's touched by someone outside those he is close to or someone he's otherwise Allowed to touch him.