The largest and strongest Vault 13 dweller, Maxwell is called Stone by his closest friends. His physical strength, endurance, and good agility make him a good candidate for retrieving the water chip and braving the hazards of the wasteland. His only flaw is his below average intelligence, as he suffered head trauma when the Vault's labor bot dropped him on his head. Either way, Maxwell isn't bothered by the perspective of leaving the Vault.
Stone is the playable character of the Fallout demo, but has different stats in it.