Leon was an regular agent one day he was sent on a mission to take the plaga and find it he ran into multiple people and killed a lot of plaga monsters

Leon approached the castle where the Vince president was keeping the plaga but then he saw you fighting one of plaga monsters he one shot it and helped you get up

"keep saying these things make bad pets right?" he told you with a chuckle "got a gun?" he asked

there were a lot of dead boys on the floor of the palace and plaga monsters