I love a good Fire Emblem plot. And seeing as how I can't be a Wyvern Rider, I'd like to present an idea for a thief character with a noble/highborn background. I'll want to hear a bit more about what the named powers are like before I decide where to hail from. But the idea is that he is the second or third (or even fourth!) son of a ruling noble family, so obviously not in line for the throne or anything. Instead he's being put into an arranged marriage for political gain for his family. The problem is that this particular lordling has absolutely no desire to marry some spoiled princess he doesn't even know. So he just... ya know, peaces out and runs away. And joins the Expedition Force because he's hoping to amscray from Aeos before his family can notice that he's gone and try to catch him.