Orphaned during the Clone Wars,[2] Jann Tosh grew up under the care of
his Uncle Gundy on a dusty Mid Rim mining world called Tyne's Horky. Living the grueling life of a miner searching for Keschels, but dreaming of
becoming a pilot, Jann's fortunes took an unexpected turn for the better when he happened to meet with a frightened protocol droid and his astromech
counterpart at the local droid auction.
After purchasing a much needed Mining droid to help at his uncle's mine, Jann took pity on the protocol droid and R2 unit after witnessing the rough
treatment that their new master Yorpo Mog inflicted on a lanky looking Android. After trading his mining droid to Mog in exchange for R2-D2, C-3PO
and the barely functioning android, Jann loaded the droids into his 48 Roller wheel bike and prepared to make his way home. But before he could even start
the wheel bike, he caught sight of an angry Yorpo Mog charging towards him. Jan quickly started up the bike and sped away, but not before Yorpo leaped
aboard. After a wildly careening ride through the desert, Jann was able to throw Mog from the vehicle and reach the safety of home.
After witnessing his uncle's fury over the new droids, Jann soon discovered that the android was not really a droid at all, but was in reality a weak and delirious
alien. In time, the alien, who Jann had named Kez-Iban (Bocce for 'he who returns from death'), became a great help at the mine, on one occasion even
rescuing Gundy from a mine cave-in.
Jann with his companions on Tyne's Horky.
As Jann, Kez-Iban and the droids were taking Gundy to the nearest medical center to have his injuries treated, they were spotted by Yorpo Mog and his master
Kleb Zellock. Zellock had been hired to find the lost prince of Tammuz-anMon Julpa, and feeling certain that Jann's purple skinned companion was the
bounty he had been looking for, he sent Yorpo to capture him. After being informed by R2-D2 of the capture, Jann went straightaway to Doodnik's Café, Kleb's
favorite hangout, to confront the kidnappers. Upon arriving at the café, Jann found Kleb and Yorpo roughing up the Tammuz-an Sollag, a friend of Mon Julpa
who had hired Kleb to find the prince. A brawl ensued, and Jann only narrowly escaped injury due to the intervention of a female freighter captain named
Jessica Meade. But as Jann and the droids exited Doodnik's, they were immediately captured by Yorpo Mog and two of his droids and brought as prisoners
to Kleb Zellock's Nergon-14 mine.
Shackled deep in the mine, Jann was reunited with Kez-Iban, who was also being held prisoner. Due to the resourcefulness of Jann's droids, were soon free
from their restraints and able to defeat one of the mining droid guards who had just thrown Sollag into the cell. After reuniting Kez-Iban with his royal scepter,
which had been concealed under Sollag's robes, the Tammuz-an prince regained his memory and was now able to communicate.
Jann and his comrades set out to escape, battling the armed mining droids that stood in their way, eventually reaching the office of Kleb and his henchman
Yorpo. Debilitating Jann, Mon Julpa and Sollag with a piercing siren wail, Kleb fled the room as the Nergon-14 deposits in the mine began to erupt. Just as he
was about to flee on the only available skiff with a stash of Keschels, Kleb turned on his accomplice Yorpo, deciding to leave him behind to die in the
explosion. But to a disturbance caused by C-3PO, who had just come upon the seen, Yorpo was able to blast Kleb with a stunner. Seconds later, Jann and the
rest of his companions arrived, boarded Kleb Zellock's custom skiff along with Yorpo and the unconscious gangster, and fled the mine just before the
Nergon-14 erupted in a gigantic explosion.
Upon arriving home at his uncle's claim, Jann discovered that Gundy has found a Keschel vein in his mine as a result of the cave in. Now that his uncle had
become rich, Jann decided to leave Tyne's Horky and accompany Mon Julpa and Sollag back to Tammuz-an to help the Prince gain his throne.
Aboard the freighter bound for Tammuz-an, Jann discovered that their pilot was none other than Jessica Meade, the woman who had come to his rescue at
Doodnik's Café. Soon after their meeting, the ship came under attack by the pirate crew of Captain Gir Kybo Ren-Cha. All of Jessica's freighter was destroyed
in the attack, save for a small portion including the cockpit, which was able to disengage from the main craft and fly under it's own power. As the pirates moved
in for the kill, Jann and his friends were unexpectedly saved when the bounty hunterIG-88, who had been hired to collect a bounty on Mon Jupla, fired on
the pirates from his starfighter.
After their night-time arrival on Tammuz-an, Jann helped Mon Julpa and Sollag orchestrate a plan to evade capture by the power hungry vizierZatec-Cha,
make their way to the Keeper of the Tower, and present the Tammuz-an Royal Scepter to the Keeper before the first sun of the equinox. Only then could
Julpa assume the role of King. But before they could put their plan in motion, Julpa was captured by IG-88 and the Royal Scepter was handed over to Zatec-Cha.
Jann and his droids now had no choice but to hastily put together a rescue mission to free the Prince and Jessica, who had also been captured, and retrieve the
Scepter from Zatec-Cha befor the vizier could use it for his own coronation. With the help of his droids, Jann's mission was a success. He rescued Mon Julpa
from being fed to a Durkii, saved Jessica from her captors and helped Julpa regain the Scepter during an air battle fought with small one-man Repulsorcrafts. Immediately after his coronation, Mon Julpa appointed Jann a captain in the space navy of Tammuz-an.
On one of his first missions for King Julpa, Jann was flying escort in a R-22 Spearhead for a supply ship carrying a load of fuel when the ship came under
attack by Kybo Ren-Cha's pirates. When the supply ship and it's captain Jessica Meade were taken by the pirates, Jann was forced to surrender rather than risk
harm coming to Jessica, R2-D2 and C-3PO. With his fighter caught in the pirate's tractor beam, Jan and the fuel tanker were taken to Kybo Ren-Cha's
headquarters on the planet Tarnoonga. While being held by the pirates, Jann was informed by the pirate captain of his plan to conquer Tammuz-an. Without
the fuel from the supply ship, Tammuz-an's space navy would be unable to put up a fight against Kybo's captured Imperial Star Destroyer, the
Demolisher.
Jann and his friends were then transported by a Bantha-II cargo skiff to an area of the sea known to be inhabited by a Miridon. After being thrown into the
water, Jann was rescued from the beast by R2-D2, who had jumped into the ocean taking C-3PO with him, and brought to the safety of a cavern underneath the
pirates headquarters. Infiltrating the pirate hideout, Jann and the droids were able to meet up with Jessica, make their way to their spacecraft and flee.
Before Jann could make his way back to Tammuz-an, he and the droids were captured by the tractor beam of the Demolisher. While Jann was held prisoner
aboard the pirate Star Destroyer, Kybo destroyed the fuel tanker moments after Jessica jettisoned in an escape pod. Upon seeing that the ruptured tanker
contained no fuel, Jann revealed that his escort mission was actually a decoy and that the real supply ship had safely arrived at Tammuz-an. At that moment
Mon Julpa's fighters launched their attack on the Demolisher as R2-D2 sabotaged the vessel by causing its torpedoes to backfire. Racing to the Star
Destroyer's hangar, Jann and his droids were able to reach the captured R-22 Spearhead and escape the pirates.
Following the capture of the pirates, Jann served as an advisor to Mon Julpa in peace negotiations with with the warrior chieftain Lord Toda. The negotiations
were hampered, however, when Kybo escaped from Julpa's dungeon and fled aboard an R-22 Spearhead with Toda's daughter Gerin as hostage. Jann and
Jessica were given the task of rescuing Gerin while Julpa placed himself in Toda's custody as a sign of his goodwill. After C-3PO and R2-D2 learned of Kybo
Ren's destination from the imprisoned pirate Jyn Obah, Jann, Jessica and the droids set off for the bog moon of Bogden. Their rescue mission was
successful and the pirates were finally defeated by Lord Toda's forces. Following the mission, Jann bid farewell to Jessica as she departed for Tyne's Horky.
After Jessica Meade's return to Tyne's Horky, Jann decided to pursue his dream of joining the Imperial Space Academy. While he waited for his acceptance notification, he continued to serve Mon Julpa and Lord Toda, volunteering to escort Toda's strong-willed son Coby to the Imperial Academy's retraining program. But during a stopover at the Zallakesh spaceport on the world of Chuzalla, Coby became separated from Jann after the young Prince purchased a starfighter and set off with Jann's droids in pursuit of the Starhunter's Intergalactic Menagerie and Coby's stolen pet. Receiving an SOS from Coby, Jann was able to catch up with the boy on the planet Dandelo and put an end to the Starhunters illegal operation. It was there that Jann revealed to the droids that he had finally been granted acceptance into the Academy. Unfortunately, trainees were not permitted to bring their droids with them, so Jann reluctantly parted ways with C-3PO and R2-D2, leaving them behind with the Fuzzums on Dandelo.
A capable fighter, pilot and inventive strategist, Jann was able to rise from being a peasant on an insignificant world to being a royal adviser and military leader on Tammuz-an.
Jann Tosh was released as an action figure in 1985 as part of Kenner's Star Wars: Droids line. These action figures were size-compatible with the other Kenner Star Wars action figures, but design-wise, they represented a completely different toy line.
In the episode "The New King", which takes place before the Battle of Yavin, Jann Tosh supposedly pilots an A-wing fighter, and at least one B-wing is seen in the hangar on Tammuz-an. However, neither starfighter was built until afterward. These vessels have, however, been retconned as R-22 Spearheads and H-60 Tempest bombers respectively.
According to the brief character biographies on the card backs from the Droids action figure line, Jann is described as being a teenager, while his current Databank entry at starwars.com states that he is about 20 years old. The cardback also indicates that Gundy and Jann have traveled to several worlds in search of treasure. If this information is considered canon, then Tyne's Horky is probably not Jann's planet of birth.