Not much is known about the creature known as Soldat de Roche, or Stone Soldier. At first it was assumed that it was a male, but throughout the short history of the team known as Jeu d'Extrémité (End Game), Soldat de Roche has given some indication that perhaps it was a female before the transformation. Whoever it was before, the creature known as Soldat de Roche was 'born' inside the Gravelines B 1-4 energy plant during a nuclear meltdown when the Maximum Force villain team decided to destroy the reactor.

The radiation leak triggered Soldat's dormant ubergene and transformed it into a stone-like creature: very hardy but with little connection with its past life. Soldat has followed Commandant Cerebrale since recovering from the transformation, but it is clear that Soldat only follows because it has absolutely no idea what else life could offer such a monster as it has become.

Soldat suffers. It has become an unfeeling monster and the longer it lives the deeper its depression becomes. Soldat desperately wants a cure for its condition but considers its hideous physical form to be in more need of a cure than its terminal case of radiation poisoning. Doctors have estimated that all survivors of the Gravelines B 1-4 energy plant disaster have less than two years to live. Sometimes Soldat thinks that is too long.

"I am already suffering. Death would be a welcome respite."

Soldat is a very large and dense creature: its skin is so dense that most conventional weaponry simply bounces off or snaps upon contact. It also possesses an impressive physical strength, able to lift in excess of 3000kg, and most unlikely of all is its capacity for effective hand to hand combat. While opponents may underestimate Soldat's speed they generally find themselves beaten to submission by its lightning fast strikes and debilitating grapples.

Soldat stands over two metres tall and weighs in excess of 500kg. Since the transformation it has refused to wear clothing, although its body reveals little in the way of distinguishing marks. While Soldat may appear male it is still a contested question. Soldat's skin is dark granite and there are specks of silver which are highlighted in the sunlight. Overall there is a definite squareness and jaggedness to its appearance.