I always thought Micaiah was interesting. Don't get me wrong, her personality is about as interesting as a sack of bricks. However, she's the first lord I've noticed that doesn't become h4x by endgame... She's a magic using main lord, the first (for me, anyway.)
She's a staff user. Her magic stat usually always caps given that it's one of her highest growths, so if you use BEXP on her, her magic will be shooting up. Her durability is crap, but that's kind of interesting in a sick way. She's a main lord that needs protecting, kind of how you'd imagine most main lords should be.
I still hate her.