Sig the Viking

Sig the Viking is a character exclusively associated with the promotion of the How to Train Your Dragon Live Spectacular. He does not seem to appear in the actual theater production, but rather promotes it outside venues where the show is playing during the tour in the United States, along with a Deadly Nadder, played by someone in a puppet suit.

Training a Dragon
Sig the Viking relates that he started Dragon Training by taking an egg from the nest of a mother Nadder in a hard-to-reach place such as a sea cave or volcano. He then trains it by using the 'Viking Stare' which equates to a dominance stare, and also by finding the blind spot and sweet spots of the dragon. The baby Nadder seems to enjoy it when Sig scratches it under the chin and neck.