Arrogance, Innocence, and Patience

Arrogance, Innocence, and Patience are the three-headed Deadly Shadow who is the riding dragon of Fishlegs in the books. Arrogance is the head on the right, Patience is the middle one, and Innocence is the left one. They belonged to Termagant, until she died, and now they are Fishlegs'.

During the Dragon Rebellion, they were hired by Furious to assassinate Hiccup, but they could not get him. When they did find him, they also found he was wearing Fishlegs' lobster-claw necklace, and thought he was Fishlegs. They told him the story of the necklace while he tried to get them out of a trap. Later, when they rescued Fishlegs, they became his riding dragon.