Gustav Larson is a character that appeared in the Riders of Berk series.

This young boy is the Larson's olders son, his youngest sister is Hildegard, the newborn girl that Gobber didn't want to name like their parents wanted, commenting that she was too ugly to be called that way. Gustav was traded by his mother to Snotlout in exchange of a magic stone, that in truth was a Changewing's egg. He became the older viking's assistant but he also started to act and talk like Snotlout, making him a little bully to the other riders. Fishlegs was able to send him back to his mother the second time he ordered him to, with the boy doing so in tears.