Louis was by far one of my favorite ally characters in Fire Emblem: Engage.

A heavily armored knight, he was definitely the character that had the most endurance with and I only remember him dying maybe once or twice.

I think I was pretty much a maverick by pairing him with Lyn. But having him shoot a long range arrow did improve his flexibility.

Sometimes I would just put him in one particular flank of the mission and have him defend or slaughter the upcoming waves, single-handedly.