Meet Laurence Blaise Louise!! He's a fifer in the French Grande Armée. He's a survivor of the Blight and is half French half British.
Here's a ref from Pinterest of what he wears:
Instead of the pompom on his shako being green, it is read instead and doesn't have a number thing. Laurence doesn't carry a musket or any firearms because he's a musician. He does carry a saber though.