Father Frost, portrayed by Irish actor Rio Fanning, is a priest who acts as Damien Lennon's carer.

After discovering that the latter is the real culprit behind the theft of Mr. Benson's grey whistle he marches the younger priest by the ear over to the Craggy Island Parochial House to confess to the theft in front of everyone there.

Damien Lennon is always quite rude and immature towards him and after Father Frost tells him he is being punished for the theft by not getting any dinner, Damien gives him a shove saying he didn't want any anyway.