"My infiltration into the Berkian world, years of building trust, behaving as if I were some buffoonish fop, kissing the boots of Stoick the Vast and his scrawny heir to the throne, all in pursuit of the one thing I could not obtain myself: The King of Dragons."
Johann is a seafaring trader who visits Berk from time to time, offering goods to barter for. However, he is later revealed to be allied with the Dragon Hunters, having secretly been working against the Dragon Riders by pretending to be their ally for years. He made his first appearance in the Dragons: Riders of Berk episode Dragon Flower. He is the main antagonist of Dragons: Race to the Edge.
Trader Johann has dark brown hair and beard tied into a twist knot. He wears an off-white sack hat on his head, long-sleeved shirt with deep blue white-swirled imprinted tunic and deep red sari over it, light gray cloth bracers on his arms (each bit of cloth goes between the second and third finger), brown belt with a yellow pack and knife around his waist, multi-colored pinstriped pants, and light brown boots.
Johann pretended to be a likable fellow, and everyone on Berk greatly anticipated his visits. His bargains seemed reasonable, and he even gave away an object freely from time to time. Stoick and Gobber seem to enjoy his company and are quite willing to mend his boat when it is damaged. He does not dress in a typical Viking garb, and he talks in an English accent. Even though his garb is not typical of a Viking, he does still sail a typical Viking ship. His nationality is unknown, but he does claim Berk to be his favorite island (though he also says that Outcast Island is his favorite Island while he and the Stoick, Gobber and the riders were there, but it might have been part of the plan or a marketing tactic.) He is certainly cultured from his many voyages, and because of this he is greatly looked up to by some of the inhabitants of Berk and Outcast Island.
Johann may possess fighting prowess, as he claimed to have wrestled a giant squid for its ink, and was willing to act violently toward Snotlout, Ruffnut and Tuffnut for leaving him stranded in the middle of the ocean. However, despite his apparent friendly relations with Berk, he is still a businessman first, as he sold metal from a Berserker to Gobber, despite the fact the two have bad relations, implying he didn't care enough to warn them and when told it had led to all their metal being stolen as eggs were laid in the metal, he simply apologizes and says nothing can be done.
However, at the end of season 5, it is revealed that his whole kind and easily frightened personality is fake, and that he is actually evil and manipulative. He has secretly been after a dragon eye lens on Heather's belt that could lead him to the "King of Dragons ", and only begrudgingly pretended to be kind to Stoick and Berk to get close to them. In a way, you could also see Johann served as a distraction to get the dragon riders away from their island in several instances such as in: Dire Straits, Dawn of Destruction, Edge of Disaster, Part 1, and Edge of Disaster, Part 2. Johann is also extremely patient, willing to wait for many years in order to completely gain Stoick and Berk's trust (though Snotlout has doubted him several times already). The way he acted violently towards Snotlout, Ruffnut and Tuffnut hinted at his true nature.
Abilities, Skills and Talents
Deception: Johann was a cunning master of deceit. He was able to manipulate every member of the Hooligan Tribe that he was an ordinary merchant so that he would understand their strengths and weaknesses. Johann was extremely patient and waited for years to gain the Hooligans' complete trust until the time was right for him to strike. He would often charm them with stories that he either made up or plundered from real merchants that he assassinated. Johann could tell if Viggo was betraying him through his time with the Vikings of the Archipelago.
Combat: Johann was exceptionally deadly in combat, and his primary weapons were his daggers that he had hidden beneath his sleeves. He was a capable marksman as shown when he threw his daggers with near pin-point accuracy and when he shot down the Skrill with a single crossbow bolt that was laced with Dragon Root. Johann was also rather proficient in physical combat, able to punch and pin down Hiccup for a certain amount of time.
It is revealed in In Plain Sight that Johann had been deliberately attempting to rid the Archipelago of the Dragon Riders since Breakneck Bog.
This may mean that he wasn't evil yet in his first appearance in Dragon Flower, as Breakneck Bog was his second appearance.
It is also possible that Johann became evil after Breakneck Bog because of Snotlout, Ruffnut, and Tuffnut marooming him on a island, and he begun hating Dragons and Dragon Riders in particular.
The way Johann hid his daggers was probably inspired by the Assassin Brotherhood from the Assassin's Creed franchise.
Johann's name, occupation, and character design seem to be an explicit reference to Trader Jones from cult British TV show Charlie Chalk. It must be said, however, that Jones lacked Johann's predisposition towards hurling sharp objects at teenagers.