Snow imps could be found near the Lumbridge, Burthorpe and Prifddinas lodestones during the 2015 Christmas event. They could be spoken to in order to start the event, and explained that the player's snow imp, Jack Frost, Santa Claus and the Queen of Snow went missing after investigating a strange iceberg north of Daemonheim. They instructed players to lodestone teleport to the iceberg in order to try and save them.
After progressing in the event, two more snow imps appeared on the iceberg to instruct players on cooking and tasting food for the penguin feast. Whenever the food required for the feast changed, they would tell players via overhead text.
After the fourth part of the event became available, another Snow imp could be found at the bottom of the slope in the cooking area, and offers a teleport to the top of the iceberg. More non-interactive snow imps appear in the final cutscene of the event.