Ari's band of Freedom Fighters was captured by Robotnik. Robotnik promised Ari their freedom if Ari helped lure Sonic into a trap. Ari kept his part of the deal, but Robotnik roboticized Ari's friends while Ari was doing his part. Dulcy and Sally rescued Ari and then Ari saved Sonic to make amends. Ari ended up getting sucked into the Void (the trap Robotnik created for Sonic). However, before he vanished, Ari told Sonic about the King's list and that other Freedom Fighters around Mobius were looking for Sally.
While in the Void, Ari was reunited with the King, and also encountered the sorcerer Naugus. When Naugus found a way to escape the Void (by using Sonic's speed), Ari and the King were able to escape as well. While prolonged exposure to the Void meant that Naugus and the King had to return, Ari had not been in the Void for that long and was able to join Sonic's Freedom Fighters.
- Ari's name is a play-on of Aries, the Latin word for ram, and also the name of a sign of the Zodiac.