Agent Valente was an FBI agent who was called to investigate the mysterious disturbances caused by Sam and Dean in Season Seven episode Slash Fiction. So far he has only appeared in this episode. He pretends to be a good-natured FBI agent but is in reality a monstrous Leviathan who appears to have no trouble containing his hunger. The Leviathan boss may have ordered him to possess an FBI agent as he may have needed someone inside the police force.