Saw the twins fanart:
Okay, I'm warming up a little bit to this. At first I thought the characters turned into the characters from older FE games. However, it's more like a Persona which makes sense because Tokyo Mirage Sessions already explored a Persona X Fire Emblem crossover in a unique way. So this is like Persona X Fire Emblem if it was more FE oriented.
That Marth movement must be a trademark because it looks so close to that of the Smash games.More Marth teamup action:
Marth Cutscene:
character chart by a Fan:
The best part is that you can customize your Joy-Cons with a computer application with Bluetooth so it can be any color you want or even unreleased colors.