*Membership spots not really limited!
Every group of characters usually has a lancer. It's a character that isn't the leader, but always gives the leader crap. Like Raphael in the Ninja Turtles, FaceMan in the A-team, or Jane from Firefly.
It comes from the character Lancelot, who was always challenging King Arthur.
I thought it was Guenevere that Lancelot challenged?