An answer to Morgan's question - Lucina didn't really understand what was going on. This was her first time hearing of the rules that surrounded the Justice Cabal; her expectations, at most, were them shouting long move names at each other as they trained. Or something like that. If Cynthia was involved, it probably also involved extremely flashy entrances.

Needlessly to say, her expectations weren't exactly very high. Though, listening to them discuss it made it seem like there was more to this than she originally thought.

So while Lucina kept her silence under the shade, her expression turned from amusement, to mild surprise, then back to amusement. Time to listen to Owain's - er - fanciful way of speech.