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 Cecelia  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. 

Humprey is more mellow, slow to catch on to his feelings for Cecelia, and not very assertive. Throughout his route, Humphrey was always there to save Cecelia from danger in the nick of time. Humphrey is very caring, reassuring, and is comforting towards Cecelia as she goes through her struggles in transforming into a vampire. 

Once Humphrey brings his feelings into the light, he continues to love Cecelia both unconditionally and passionately throughout the reminder of his route. He was stated to have fooled around with women before he met Cecelia, however, he falls completely head over heels for her. 

Being immortal, Humphrey is over 500 years old and is said to have been acquainted with Cecelia’s ancestor: Tatiana. Humphrey is a very skilled wizard who travels around helping other species with his magic and potions.