Frederick Mercer

Frederick Mercer
According to Alfie, he saw Mr. Mercer down in the cellar when he went back down to get his mask back. He is Joy's father, though everyone in Sibuna, except Alfie, was probably unaware he was in the Secret Society until the finale of Season 1. He and Victor also stall Sibuna by showing them that Joy is "safe" and that the teachers are protecting her and her father. However, when Patricia goes to talk to Joy in the middle of the night again, Patricia finds out that the reason why she disappeared was because her dad let it slip to the Secret Society that her birthday was on the seventh day of the seventh month during the seventh hour. (July, 7th at 7:00 pm) Patricia also learns that the Chosen Hour was approching and that Joy's dad was a part of the Secret Society.