While not honorable like Tensai, Lupus is a down and dirty fighter, doing things that Tensai probably wouldn't do in a fight. They are also excellent hand to hand combatants, and with the both of them fighting as humans, and not one as a weapon, it could be difficult for their enemy to decide what move to make so that they don't leave an open spot for their the duo. The enemy will be put in a hard spot like this.