Jesper

Jesper is a level 1 quest giver located in Cathedral Square in the human city of Stormwind. He is only available during the annual Hallow's End event.

There is an Easter Egg with Jesper, which involves the player summoning a Spring Rabbit. The pet will walk to Jesper and stand on the same spot, then Jesper will sit down for a moment and stand up. The rabbit will have disappeared. (This was removed in patch 3.3.3)

He starts the quest (Hallow's End).

See List of Stormwind NPCs.