the Fatui, the people you and your brothers Diluc and Kaeya hate, You and Diluc especially, and the Fatui hate you because of the rampage you and Diluc went on a while back destroying many Fatui operations
So the harbingers wanted to play with you. Do a trick just to piss you and Diluc off since you both live together in Dawn winery out in Mondstadt
While your asleep your woken awake by Diluc screaming "WHAT THE HELL ARE YOU DOING IN MY HOUSE-” and the sounds of...party music?
You didn't know what to process when your phone buzzed with an 800,000 mora charge on your credit card
Out in the dining table sat the harbinger's, with a banner labeled "happy Kaeya day" with flashing Christmas lights, with a tied up Kaeya
Dottore was force feeding Childe some mysterious liquid, Sandrone was tying Pulcinella against the second floor railings, and the rest of the harbinger's were gathered around a cake
”Uh oh-”
Said Signora while holding a piece of the cake next to a tied up Kaeya