Jango Fett was a renowned human bounty hunter, assassin, mercenary, and the "father" of Boba Fett, a genetic clone of his, whom he raised as a son. He was a member of the Fett-clan and was related to his distant cousin Melvin Fett.
Fett agreed to serve as the genetic template for the clones that would form the bulk of the Grand Army of the Republic during the Clone Wars. Jango was to be a template for an army of clones, and millions of clones were created in his likeness at the cloning facility on Kamino, whom he supervised the training regimen sessions for the clones to be train after by.
During his time on Kamino, the Alpha-ARC's and Delta-ARC's received highly specialized training from Jango himself, while their counterparts, the clone commandos, received training from a group of former Mandalorian mercenaries, which Fett dubbed the Cuy'val Dar. He would also teach his son, Boba Fett, who would learn all the skills and values he wanted to teach him, and would later take on his father's line of work. He developed a close friendship to the Kaminoan assistant: Taun We and often cared for her, as well as his son, whom he allowed her ultimately to take on the role of being a foster mother to him. He also developed a strong trust and affection to Taun We, trusting her more than any other Kaminoan he came across by. His son, Boba, would also develop a strong friendship and bond with her that would last throughout the decades to come.
He was nearly struck down by Mace Windu in combat, but was saved by a Force sensitive Delta-ARC named Gohan, allowing Jango to escape. He later reunited with Boba and the two retreated with the CIS forces during the Battle Of Geonosis.
Jango and Boba would participate in numerous missions and operations for the CIS, before Jango was killed by Durge, during the first year of the war.
Jango’s legacy would live on through his son Boba, as well as his cloned brethren, who would have a profound impact on galactic history.