I would hope everyone remembers that as well as the play. Its only the most referenced non important thing in the franchise. Even doing the same cross dressing play in reverie for the class 7 kids according to the post credits art
@soralight_x idk about the light novel. The only one that I know exists is the one that stared toval as he sorted thins with Estelle and Joshua between sky 3 and zero. UT I do know it happened in the in game book 3 and 9
If you heard of the Langrisser Mobile game, when they did the Trails in the Sky Crossover and added Estelle + Joshua as playable characters, Joshua was part of the "Princess Alliance" faction.