Lucas is a skull Digger. Not much is known about him. However, he is a vicious fighter, and occasionally works with Trevor and Clayton. His helmet has larger fangs, but how they got on is a mystery.
Lucas's left hand was crushed in a mine accident. Since then, he has had a large metal blade attached. He uses this blade rather than claws, unlike most diggers. He still wears the bandages of the Digger society, though he says he has been banished.
The only game Lucas has been in he has not been a playable character. However, he does give a star piece necessary to reconstruct Star-Brite.