Akkipeddi
All set to be a nice guy
The title XY109 was "The Master Class Trial! What Will You Do, Serena!?", and many of us were confused if it would be the start of the Master Class Showcase while it was just Serena earning her 3rd key and qualifying for Master Class.
That's not really the same though. In SM, trials and grand trials are the key focus of this series, and they won't use these terms interchangeably. The summary clearly states "Grand Trial", so it's really not that complicated to understand that it's an official battle against Nanu the Kahuna.