Ustaf 'Nbekee

Ustaf 'Nbekee was a Sangheili soldier of the Covenant that served during the Third Battle of Harvest in 2531. He was a good friend to 'Crolunee, and told him of his marksmanship skills in the killing of a SPARTAN-II with his needler after the Human charged on five teams of Covenant infantryman.

But this is unlikely as no Spartan-IIs were present in the Third Battle of Havert, this may be Microsofts way for marketing and does not belong to the canon