Gunther Haddock the first born and the oldest child of Stoick the Vast and Valka Haddock and the Heir of the Hooligan Tribe.
Gunther always wanted to make his parents proud and by doing so he did many things like hunting rabbits, helping the tribe rebuild the housing, help Gobber in the forge, and be the best dragon fighter, And as the first born and Heir he's subjected to learn the rules and laws of the Tribe.
Gunther was 5 when he learn he's going to be a brother, knowing this he want to be strong to protect his brother because a chief protects his own people.
When his brother Hiccup was born it was one of his happiest moment in his life as he sees his brother sleeping peacefully, but a month later it became a dreadful day for him and to the Haddock Family as he sees his mother got taken away by a giant dragon. He cried in silent knowing that he will never see her ever again, He wanted blood dragons blood for what they did but as he was about to do something stupid he remembered what his mother told him every night.
"Not all dragons are evil and dangerous"
"but they always attack us and take our animals, isn't that why we fight because of that"
"Then promise me, that you will not kill a dragon if you are able to defeat them"
"I promise"