Overview
Xiaoyu is notoriously one of, if not the hardest matchup to learn in Tekken. She's an extremely tricky character that exploits your gaps in knowledge very hard, and to top it off her offense is absolutely not to be slept on in this iteration of the game.
(Page is still very WIP.)
Dealing with Backturn Cali Roll
As shown in the video above, Xiaoyu has a high crushing launcher out of her Backturn stance.
If not punished properly, she can crush a high you press to take your turn and launch you for free. Don't worry, though, as this move is easily punishable with pretty much any mid launcher, as she can't block in BT for about 17~ frames.