I don't care much for Roy, but if they do add another Fire Emblem character, I doubt it will be Hector or Ephraim because axes and spears are not swords, and adding the main character from FE14 would be redundant because there's already an avatar character.

If another Fire Emblem character is added, it's going to be Roy. Maybe Eliwood if we're lucky, with Roy as an alt. If we're really lucky, they'll give him new moveset.

I mean, between Eliwood and Roy, there's, certainly enough reference material.

^{Each word is a link.}

For example, he/they could fight primarily like they do before they promote: with a rapier. Stabby stabby.

Keep the neutral B from melee though, cuz its fun as hell.