Seth
Background
Seth is the father of Diana and the grandfather of Joshua and Holly. Seth doesn't care much for Michael.
During the events of Troll 2 (1990) played by Robert Ormsby
Seth tells Joshua a bedtime story about Peter and the Goblins. As Joshua and the rest of the family are traveling to Nilbog, Seth warns Joshua against the residents of Nilbog. When the family is about to eat the food left for them, Seth tells Joshua he has to stop them. He then appears to Joshua and tells him, he and the rest of the family has to leave Nilbog for their safety. He saves Joshua when he is attacked by Creedence and when Bell tries to send him back to the afterlife, he makes the Molotov cocktail Bell was holding explode, setting Bell on fire. During a seance, he tells the family he can only help them once more. He teleports Joshua to Creedence's home and tells him he has to use the power of good by placing his hands on the Stonehenge stones to stop the goblins. He then gives Joshua a backpack and tells him to use the contents when he needs it the most before disappearing.