There's nothing wrong with that, per se, it's just that there are so many Fire Emblem games that you could choose from. It would be a shame to leave out the rest of the games, which in my opinion had better characters (there! I said it). I think I'll go with Nightmare for Nirvana's split personality. It'll be a nice reference to a game series (which just so happens to be a tale of a two swords), and it will really irk Dements, which is always a plus.