Lieutenant Yussef Hussein was an Afghan Army official and a target of 47.
47's return to the Agency
He was in charge of supervising an isolated, underground base in Nuristan; housing millions of dollars worth of nuclear warheads.
He was killed in the mission Tunnel Rat when 47 infiltrated his secret base, (with help from a map stolen from Ahmed Zamir) stole the warheads (using a special card key courtesy of Colonel Mohammad Amin) and subsequently murdered him in his private quarters.
Yussef Hussein is remarkably similar in appearance to Ahmed Zahir, another Afghan Lieutenant who is conspiring with Khan Abdul Bismillah Malik to sell nuclear warheads to the U.N. Like Zamir, he wears a khaki green overcoat with brown pants, complete with a red turban.