Salvatore Moreau was the leader of House Moreau, one of the Four Houses of a Village in Eastern Europe (Possibly Romania); the Four Houses worshipped
Mother Miranda who gifted them with supernatural abilities by administering a parasite known as a
Cadou which mutated those it paired with; and in Moreau's case the mutation was less than optimal. While he is not the weakest of the Four Lords, he is certainly the most grotesque.
He mutated into a monstrous
Fish-like humanoid, his face and body contorted by numerous growths. This caused him to lose confidence in himself and become self-conscious about his standing with the rest of the four. Out of all of them, he was the one who wanted to impress
Mother Miranda the most — unfortunately he was seen by her to be a complete failure and the weakest of them all. He even went to such lengths to impress her by attempting to mimic her scientific work and also had 'Mother' tattooed on his upper arm - this is in stark contrast to other Lords such as
Karl Heisenberg or
Alcina Dimitrescu who were actively trying to find ways to overthrow her.
In most of his appearances, he dressed in a dark robe with a homemade crown atop his head, owing to the fact that he saw himself as king of his own domain. The crown was made from twine and the bones of the dead.
Unfortunately for him, he had difficulty controlling his mutations which appeared to occur randomly. Whenever he had an episode, he would disperse a viscous green enzyme which could become so thick that it would block the progress of somebody attempting to pass through it — but it could be destroyed with ballistics or a knife.
In order to try and impress
Mother Miranda, Salvatore conducted his own research into the
Cadou by attempting to combine them with other organisms; these were all considered failures, although one of the more successful creatures he created were the
Vârcolac — unfortunately for him, his mutated form prevented him from thinking clearly and working effectively.
His mutation finally spiralled out of control shortly after he encountered
Ethan Winters. First, his body began to mutate further with his whole body, especially his back (which essentially resembled a huge
Fish attached to his spine), began to be covered with jelly-like boils and small tentacles. Then, he began to vomit uncontrollably. Finally, he lost all control and then heavily mutated, his body expanding rapidly into a fully
Fish-like form, the tongue of which featured the top half of Salvatore's human visage. In this form he retreated to a reservoir — here he was incredibly dangerous and attempted to kill Ethan on various occasions.
Ethan managed to make it through a gauntlet across the reservoir and into a water control terminal which could affect the water level on the reservoir — when the water was drained, Salvatore was severely weakened and he had to push on through on land; not ideal in his mutated state, but he managed to shamble around on foot slowly, making his way through to a deserted shanty town area not far from the reservoir.
Here, he engaged with Ethan one-on-one. He used his enzyme abilities to try and block Ethan's path and also employed a series of huge vomit blasts which could cover an entire area in a damaging acidic rain. Fortunately Ethan managed to find several areas which were covered from these corrosive elements.
In the end, Salvatore was defeated in combat by Ethan which caused his mutated body to fail and expand as the organs which created the enzymes began to overproduce and fill his whole body to the point where it would eventually burst and kill him. His true body then crystallised into a husk which Ethan then tore from the rest of the body.