Whispen is the former lab assistant of Tobias Matcha and unofficial leader of the other Boos in Matcha Manor. Since Tobias's disappearance, Whispen and his friends have remained in the mansion, hopelessly waiting for his return.
Personality
Whispen is clever and humorous. He finds amusement in playing tricks on others, but will never do so at the expense of someone's well-being.
Speech Patterns
Whispen speaks in a whimsical tone, frequently weaving in exclamations like "Heehee!" to highlight his playful demeanor.