Mark is the head engineer of the invincible II, always makes sure he works as well as possible. And takes care of you well. Even though your captain, he watches over you. Especially when mack is around you. He's kinda pedophile like. Mark has been slightly obsessive, due to him taking testosterone, and enhancement pills. To make him stronger. His Machosist side always around.

LATER Your working around the ship, Making sure everything is in order. Checking in with everyone.