A lightsaber was the weapon of choice for the Inquisitor identified as the Fourth Sister. Its design mirrored the double-bladed spinning lightsabers used by other members of the Imperial Inquisitors. She made use of this lightsaber during her assignment to capture the Jedi Master named Obi-Wan Kenobi, which took place on Daiyu.
Lina Graf, a commander serving the Alliance to Restore the Republic, once infiltrated Fortress Vader located on Mustafar. She was wearing the Fourth Sister's armor, which had been stolen. Vaneé, an attendant, eventually discerned that Graf was not the Inquisitor because the lightsaber was absent.
The Fourth Sister's lightsaber made its debut in the second episode of the Obi-Wan Kenobi television show, which was initially broadcast on May 26, 2022.
Brad Elliott, the propmaster, ensured that the dimensions of the prop's rings and handles were appropriate for the character who would be using it. The prop was modified to accommodate Rya Kihlstedt, the actress portraying the Fourth Sister. The prop was capable of illuminating and possessed considerable weight.