Of course, if we're going to be dealing with ships and robots, we're going to need an engineer. That's where Lucca comes in. She's an incredibly brilliant inventor, and she can surely fix any machine that needs a tune-up. Her quirky, vibrant personality means she'd fit right in with our ragtag group of pros, and her knowledge about all things science will undoubtedly come in handy.
Plus, Lucca's Telepad invention could allow her companions to travel through time should things get a bit too out of hand once the Mayans return from outer space or whatever. Lucca, in a sense, is the most important member of the party, because her odd inventions might just be crazy enough to save the day. And if all else fails, she can light things on fire with her flame powers. And that's pretty cool, too.