Funnily enough, I also had the idea of making Narcian playable for my hack. I’ve got Guinivere or Lilina who can recruit him. In each case, this bad guy has his own motivation for changing sides.
It’s in French though.
I’m also working with supports for him.
And battle quotes.
The day I (finally) finish this project in my native language, I’ll see if anyone wants to help translate it into English.
Good luck with yours, because writing supports for Narcian isn’t easy, given how unsympathetic the character is to other people.