I like the idea of a female lord with an axe. Maybe one with an Ephraim like personality.
Honestly, when it came to Fates I was happy to see they did away with a blue haired lord. Its such a minor thing but it annoys almost as much as Chrom throwing his sword in the ground after each attack animation. I don't care how magical your sword is you don't go throwing them in the ground.... Ike's not off the hook either.
Anyway, the other day I was thinking about a lord that was a like a captain of a platoon. Whatever kingdom he/she fights for gets crushed by the villains at the start, most of the army is killed. Its starts off with just surviving the aftermath to building a resistance. People follow him as a leader of the resistance though he really doesn't want to. Only reason he does is cause he knows the survivors will probably die without him.