Rexicus Saturnus

Rexicus Saturnus is a young Mogdorian commander, who appears in The Forgotten Ones.

After the events of The Search for Sam, Rex survives the collapse of the New Mexico underground base and meets up with Adam, who helps him to the surface and find shelter. During their time of recovering from the incident, Rex realizes who Adam is and desires to kill Adam for his betrayal, despite that he saved him. After providing information that the Mogs are attempting to harness the Chimaera shape shifting gene and adding it to their Vat born soldiers from the captured chimaeras who are being held at the main facility in Palm Island, Adam forces him to take them all the way to the main research facility in Palm Island, New York.

While Rex does want to kill Adam, he also forms a small friendship with him and begins to like him. After an attack from the Mogs and hiding during the battle, Rex rescues Adam in the aftermath and takes him to Palm Island. When Adam asks why he hasn't killed or betrayed him, Rex replies that he doesn't know and that he wants to fulfil his promise. Coming up with a plan, Rex pretends to take Adam as a prisoner and infiltrates the facility.

Later on, he breaks him out and they find the Chimaera, setting them free. After saving the Chimaera  and making sure that Adam  is free to escape, he stays behind, still believing in the Mog Cause and hoping to re-join his fellow Mogdorians.

His fate is left unknown.