Stoick the Vast is Hiccup's father, and the leader of the Vikings. It was said that when he was a baby, he tore a dragon's head off its shoulders with his own hands. He is known for his strength, spunk, and one-sided conversations with Hiccup.

He longed to find the Dragon Nest, and it became an obsession of his. He was flat-out embarrased to have Hiccup as his son, due to Hiccup's un-Viking personality and looks. However, he was very brave and several times helped save Vikings' lives, including his son's.

One day, after coming back from an attempt to find the Dragon Nest, he found out that Hiccup had not only passed dragon training, but was at the top of his class. He was extremely proud of Hiccup for this, but after he found out Hiccup was only fighting dragons through unorthodox means--including keeping a Night Fury dragon of his own in secret--he denounced Hiccup as his son and used the Night Fury, Toothless, to lead him and the other Vikings to the Dragon Nest.

He only realized his mistake when a monstrous-sized dragon emerged from the nest, threatening to kill all the Vikings. Hiccup arrived and tried to rescue Toothless, and seeing his son's love for the dragon, he broke Toothless free of its bonds himself. After Hiccup and Toothless defeated the dragon, he apologized to his son and made amends. He then decreed that the Vikings and dragons would live together in harmony from then on.