Ketsu Onyo is a character who appears in the Star Wars Rebels episode "Blood Sisters" and makes a cameo in the episode "The Forgotten Droid". She is a Mandalorian bounty hunter and an old friend/partner of Sabine Wren.
Ketsu is an old friend of Sabine Wren before joining the Rebel Alliance. Both attended and escaped from the Imperial Academy on Mandalore together to become bounty hunters. But they eventually had a fallout and took different paths. Ketsu became a bounty hunter, contracting with the Black Sun, while Sabine became part of the Rebellion against the Galactic Empire.
- Ketsu's design is based on some abandoned concept from the early development of Star Wars: The Force Awakens.
- She is the second Mandalorian character to appear in Star Wars Rebels, followed by Sabine Wren.