I'm guessing/hoping Charlize is going to make an appearance at that sword competition and completely curbstomp the competition, including her brother, and then just not acknowledge that they know each other.
kind of surprised there haven't really been any jokes about Catarina secretly being in super great shape bc of all the training and farming she does. "I may not have very strong magic, but I do have THESE GUNS, SON!"
Seriously, I was not expecting this side story to go this deep into this part of the story. I am both glad we get to see it and sad about what's to come.