The Hall Moanitors are the hall monitors of Haunted High.
The three generally act as the lackeys of Principal Revenant. HM Future predicts students' actions, HM Present carries out detention chain sentencing, and HM Past collects records of student activity.
The three are good guys by the end of Haunted.
- Hall Moanitor Past (voiced by Joy Lerner)
- Hall Moanitor Present (voiced by Audu Paden)
- Hall Moanitor Future (voiced by Audu Paden)
- They are based on the three spirits from the famous Charles Dickens book A Christmas Carol.