As a mortal, Enforcer Montero took delight in only one thing. Inflicting pain. A huge hulk of a man, he stalked the halls of Cerro Rico brandishing his long cat of nine tails, using it brutally on the miners, with little excuse required.
When the Dark Wind came. Montero was in the central chamber of The New Mine. The wind transformed him, giving him great strength and size, so much so that he was too large to walk the tunnels anymore.