So, let's all take heed of wise king Solomon: [s]cut Deon and Elizabeth in half, and fuse the four halves into an Elizeon and Deobeth Frankenstein horror, and make them fight[/s] make it a tie. Or make Kat interrupt the fight. 
I'm personally torn on this matter, since I know that badass hitmen can kick major ass, and I also know that Deon is much taller, and probably outweighs Elizabeth by at least 50 pounds, and knows how to beat the shit out of opponents in a situation exactly like this.
So let's just put this issue to the side, and we can come back to it later, once we've explored the potentials of all these characters. Yoshi is promising us some very delicious Deon-punch-a-fest action soon enough, so Dymion, if you really hate Deon that much, you only have to wait a little while longer.