Humphrey is a mysterious resident of Hotel Libra Sincera. He starts appearing during Raymond's route. He consumes a potion that makes his blood similar to a vampire, resulting in the Mc being able to bite him without causing him to turn. He is a wizard, but his main speciality is making potions for the guests as well as Jack and Humphrey to hide their werewolf features from the vampires. He openly flirts with the heroine. While hinted at in most routes, his route reveals that he personally knew Harold and Tatiana, making him at least 500 years old.