Protagonist | Code Vein Wiki - Fandom

We learn a bit about the Protagonist’s past when you find a Vestige in the Cathedral of the Sacred Blood that contains the memories of the Protagonist. During Operation Queenslayer, the Protagonist wakes up in a medical tent as a Revenant. They are greeted by Karen who is there to inquire into any symptoms. This is interrupted when an alarm sounds, prompting Karen to wish the newly awakened Protagonist good luck. The alarm was used by Gregorio Silva to muster all available Revenants to begin the mission to eliminate the Queen. After the debriefing, Jack Rutherford sends his team out in pairs and partners with the Protagonist to search for the Queen. They fight through a few Lost and are found by the Queen's Knight, which marks the start of a dangerous battle to be followed up by the appearance of the Queen herself. Soon Silva joins the fight, shielding Jack and the Protagonist against the Queen's ranged attacks. Just as they seem to have gained the upper hand, the Queen counterattacks. The Protagonist avoids a direct hit but their Purifier Mask is knocked off, leaving them open to the affects of the Miasma. Jack attempts to save the Protagonist by throwing his sword at the Queen, but she catches the blade with her hands. While the Queen is distracted, the Protagonist stabs her through the heart with their Blood Veil, killing her, but inadvertently draining some of her blood in the process. With the Protagonist pushed to the edge of frenzy by the Queen's blood, Gregorio and Jack solemnly thank them for their bravery and sacrifice before Jack kills them with the intent of ending their suffering before they became fully corrupted.

The Protagonist survived however, awakening years after the fact at the bottom of a ravine, their memories of the incdent having been lost. They are kept company by Io, a mysterious girl in white who treats them with the utmost care as she tends to them and nurses them back from the brink of frenzy. Unfortunately, they are soon accosted by scavenging Revenant faction and taken captive, with the Protagonist being forced to hunt for Blood Beads, incentivized by an apparent threat to Io's well-being, the Protagonist departs with their assigned partner, Oliver Collins. Their mission changed however after meeting Louis Amamiya mid-hunt. Not long afterwards, the Protagonist encounters the Lost form of Oliver, having succumbed to the miasma and transformed into one of the Lost. After defeating Oliver, the Protagonist discovers a Vestige which Louis warns them not to touch. Io seems to know something they don't however and with her encouragement and support, the Protagonist forgoes Louis' warning and picks up the Vestige. Though it initially begins to cause frenzy in Protagonist, Io soothes them and continues calmly coaching them through the process. Finally, the Protagonist then unleashes the power of the Queen's Blood, purifying the Vestige and entering the memory of Oliver Collins. After the encounter, an amazed Louis suggests that the Protagonist use their power to help save the Revenants in Vein from starvation and ultimately, extinction. As Io helps them stand, the Protagonist accepts Louis's offer and the duo join him and the rest of the Revenants on their quest to save Vein.

Along their journey, the Protagonist discovers another vestige in the Cathedral of the Sacred Blood. Upon absorbing it, the vestige is revealed to belong to the Protagonist themselves, containing their forgotten memories of Operation Queenslayer and granting them access to their original blood code, "Queenslayer".