Cloudjumper is a Stormcutter dragon that appeared in HTTYD 2 and he is Valka's dragon.

In a flashback is shown how, during a dragon raid in Berk, Cloudjumper broke into Stoick and Valka's house where a baby Hiccup was sleeping. He approached the newborn but, instead of hurting him, he was curiously watching him. When Valka's arrived, he accidentally hit Hiccup with one of his wing's talons, leaving the baby with a scar. The woman could not harm the dragon, nor he did with her, the two had a moment where they connected but, once Stoick arrived to help his wife, Cloudjumper flew away, grabbing Valka and bringing her to the dragon valley where he lived. 

It is seen that he and Valka have a very strong bond. Unlike other dragons, he doesn't have two wings but four and he can turn his head like owls do. He has two scars in one of his forehead's horns.