Dumaguete was a research assistant at De La Salle University in Manila in the toxicology department. Even before he became a lizard-man, Dumaguete was creepy and was not liked at his workplace. His interests turned to the seedy side of the street, and the local police were watching him in relation to illegal prostitution rings. One night he was confronted by an irrate co-worker who accused Dumaguete of interfering with his daughter. Dumaguete laughed in the man's face, but didn't count on the pistol which discharged five times into his chest. The co-worker dropped the gun and ran.

An hour later, Dumaguete woke up alone in the laboratory. His blood had collected around his body but he was alive. He lifted his hand: it was covered in hard scales. The bullets should have killed him, but his metagene kicked in and redesigned his entire physique, transforming him into a lizard man.

Dumaguete was impressed.

He picked up the gun which was cold, but there was the unmistakable scent of the murderer on the handle. He licked his lips with a forked tongue and made his way out of the university. An hour later he was standing in the man's bedroom inspecting the patterns of blood he had made along the four walls. The man, his wife and three daughters were all dead and mutilated.

Dumaguete was drunk on his new power and embarked upon a six-month crime spree across South-East Asia. When he became bored with the endless mutilations, he met Professor Quake and saw the wider possibilities of aligning himself with such a powerful and influential man.

Dumaguete is lecherous and sadistic, immersing himself in pleasure and pain in equal measure. He has no moral qualms about killing or causing pain, although he has shown compassion in rare cases. He is a man motivated by the moment.

"Ruthless, you say? Bloodthirsty too? Oh, but I was hoping you'd describe me as dashing and debonair."

Dumaguete has superhuman strength, reaction times, regenerative abilities and durability. He is strong and nearly invulnerable and this makes him cocky and willing to take his time in combat. He has a powerful tail which is his primary weapon, although he enjoys the use of his claws and teeth when the need to get up close and personal appears.

Dumaguete is a lizard man, covered in thick scales, with a flattened face, reptilian eyes and nostril slits. He has a large and powerful tail which is actually prehensile, and sharp teeth and claws. In costume he favours a wide-brimmed hat, leather jacket and a blue and orange bodysuit. He wears a bandana over his bald head and covers his alien eyes with a mask.