Oscar-129 (Earth-4001)

Oscar-129 was a Spartan-II supersoldier. In 2525, Oscar and four other Spartans escaped from Reach to return to their homes. Oscar learned that his kidnapping had been covered up by replacing him with a flash clone. He was overwhelmed by this revelation and committed suicide, his body being recovered by the Office of Naval Intelligence soon after.

History
The history of Oscar-129 is the same as his mainstream counterpart.