Just like Ahsoka, Bo-Katan originated from the animated series, “Star Wars: The Clone Wars,” before making the transition to live-action. In “The Clone Wars,” we learn that she has been estranged from her royal family due to her extreme political views — as a member of the militia group, the Death Watch, she believes in restoring Mandalore to its “ancient warrior ways.” Despite her radical beliefs, she’s mostly been depicted as an anti-hero who works alongside our heroes for her own agenda. When Darth Maul seized control over Mandalore and murdered her sister, Duchess Satine Kryze, Bo-Katan and her unit, the Nite Owls, fought alongside the Jedi to defeat the revived sith lord.
In the final season of “The Clone Wars,” Bo-Katan develops a friendship fighting alongside Ahsoka Tano, whom she seems to keep in touch with in the gap between this show and the second season of “The Mandalorian.” In chapter 11, “The Heiress,” Mando comes across Bo-Katan and her fellow Nite Owls in a fishing village on Trask. We learned that she was in pursuit of Moff Gideon (Giancarlo Esposito) and the Darksaber, and advises Mando to take Grogu to Ahsoka Tano. In the season 2 finale, “The Rescue,” Bo-Katan helps Mando rescue Grogu from Moff Gideon and hopefully knock out 2 birds with one stone by seizing ownership of the Darksaber along the way.
Unfortunately for Bo-Katan, Mando is ultimately the one who defeats Moff Gideon in combat, making him the true owner of the Darksaber according to ancient Mandalorian tradition.