Coincidence or Fate?

[AU/Alternative Universe] Venti is a newbie Anemo guardian who gives good luck to people, or protects people from harm and bad luck. He is assigned to take care of a young man named Xiao. Xiao is a university student who has been surrounded by bad luck ever since he was young. Was it just a coincidence that Xiao was assigned to Venti or was it fate that brought them together?