Graveheart is the charismatic miner who aims to unite the warring planets against the oncoming Beast Planet. Loyal, noble, and fiercely courageous, Graveheart is a natural leader, whose sense of right and wrong is only exceeded by his sense of honor. An able warrior, he turns to war only as a final option. Graveheart would never commit anyone to a task that he would not do himself. In the most dangerous situations, he is always the first one in and the last one out. The success of the alliance rests on his shoulders, a responsibility he bears with great honor and loyalty, and has already cost him banishment form his home world.

Jade is grim, tough, and as hard as granite. A commander in the Planet Rock military, Jade is Graveheart's childhood best friend. She is terse, to the point, and has no patience for foolishness or cowardice. Jade abandoned her commission in the Planet Rock military to accompany Graveheart on his mission to unite the Planet Cluster. While she didn't necessarily believe in his cause initially, she absolutely believes in Graveheart, and has come along to ensure his safety and success.

Gruff, arrogant, and stubborn, Lord Mantel sits like a rock on his throne and rarely, if ever, leaves it. Supremely confident in the power of his planet's battle-moons, Mantel has no interest in offering any help from Rock to the Alliance. Mantel feels that his battle-moons can handle anything that is thrown at them and that the Alliance would take his troops for granite. He may not live to regret his arrogance

Quarriors form the rock solid warrior divisions of Planet Rock. Their long history of dedication dates back to the very construction of Anvilla, the ancient capital city of Planet Rock. Quarriors provide miners protection from all possible threats during necessary drilling and essential excavation raids, as well as protecting Planet Rock from would be raiders. A Quarrior's armor is made as tough and durable as the planet itself and is able to receive a great deal of abuse before needing repairs. Many veteran Quarriors proudly wear their battle-damaged armor as a badge of honor, paying tribute to the many battles fought defending Planet Rock and its people. To meet the demands required of the Quarriors, they are equipped with an arsenal of tools and weapons that enable them with an incredible range of versatility. Self-contained breathing apparatus, multiple wavelength visors, and audio environmental sonar are all standard issue, as are concussion rifles and Sonic Cannons. Both of these use highly compressed sound waves to deliver a powerful impact to anything that dares threaten a miner.