Blackout was a special ops clone trooper commander who was in command of the stealth ship crew. He was placed under High Jedi General Obi-Wan Kenobi. He was the mentor of a rookie clone trooper, Spark.
Blackout was the commander of a stealth ship that was trying to defeat the Separatist fleet that was blockading the planet, Christophsis. During the Battle of Christophsis, the stealth ship contained Anakin Skywalker, Spark, himself, and some other special operation troopers that went up against Admiral Trench. Admiral Trench sent missiles out after the ship when it went out against them; Anakin knew he was, so when the missiles followed him, he turned all power to the engines and gunned it to the command ship and, when he arrived there, the missiles collided with the unshielded ship, blowing it up. Blackout and the others were all happy, and the Republic could then deliver supplies to the people of Christophsis and Bail Organa. He later made Spark an official part of the team as they walked out of the Stealth Ship on Christophsis.
Blackout wore grey special ops clone trooper gear, indicating his status as a stealth ship pilot. His helmet contained a very complex design of red, yellow, and white markings, and jaig eyes, an honor of bravery.