AX/RX was a modified MD-series medical specialist droid owned by Kh'aris Fenn and was active in 28 BBY. Kh'aris used it as a torture droid, utilizing its knowledge of the anatomy to inflict maximum pain.
Fenn used AX/RX to make Jedi Master Tholme surrender. Kh'aris ordered the droid to keep torturing the Jedi until he was oblivious. After Tholme used the Force to drop his life signs, AX/RX put the Jedi in a prison cell with Nat Secura.
When Quinlan Vos and Aayla Secura infiltrated Kh'aris' fortress, Kh'aris ordered the execution of his two prisoners. Tholme resisted but AX/RX electronic defense mechanism killed the Jedi—at least that was what AX/RX determined. When AX/RX neared Nat, Tholme stood up and used his Force powers to throw AX/RX into the prison wall. AX/RX survived and began shocking the Jedi again only to be beheaded by another Jedi, Aayla Secura.
- Star Wars 43: Rite of Passage, Part 2 (First appearance)
- Star Wars 44: Rite of Passage, Part 3
- Star Wars 45: Rite of Passage, Part 4
- The Complete Star Wars Encyclopedia, Vol. I, p. 50 ("AX/RX")