Louis Amamiya

Code Vein is set on a post-apocalyptic world after the event "The Great Collapse" happened. Louis is a Revenant, a human that has been brought back to life to fight against the Lost. Revenants were created by implanting an engineered BOR parasite into the heart of a human corpse. BOR Parasites (Biological Organ Regenerative Parasite) attaches itself to the heart of a creature that has lost vital functions and sends its own blood into the host, allowing it to regulate and control all organs, including the brain. BOR Parasites were discovered before the Great Collapse when creatures miraculously came back to life and eventually turned cannibal in a process called “Zombification”. Revenants can only be killed by destroying the heart, where the BOR Parasite is located. Any other fatal wound merely causes the Revenant to disperse into particulate matter which stitches itself back together later. Destruction of the heart causes the Revenant to die in truth, their body decaying into packed ash. Revenant bodies produce and manipulate a substance called Ichor. Ichor is used to fuel a Revenants strength and the Gifts granted by their Blood Code. All Revenant weapons are designed to channel and utilize Ichor to enhance their combat potential. Likewise for their Blood Veil-- a piece of clothing that acts as a Revenant's 'fangs'. Revenant's use their Blood Veil's to drain foes for Ichor. The exact nature of ichor is not examined, though it is stated that the substance was not known of until scientific inquiry into Revenants began. There is little information available as to the nature of the collapse. The Collapse consisted of the emergence of enormous thorns from the earth, known as the Thorns of Judgement, across every city in the world. It is estimated that half of the human population of the world died to this event alone. After this came the appearance of monsters, known only as Horrors when brought up, of an unspecified nature. The horrors were dangerous enough that it provoked the use of the BOR Parasite, originally intended to be utilized as a medical miracle, as a desperate and untested weapon. This resulted in the 1st generation Revenants.