Jonathan Doherty.

Key Facts About The Rookie Role & Callsign: A Lance Corporal and the newest member of Alpha-Nine. His initials "J.D." and callsign "Rookie" are a play on "John Doe," emphasizing his status as an everyman soldier. The Mission: During the drop into New Mombasa, his pod is hit, and he is knocked unconscious for six hours. He wakes up alone at night and must navigate the Covenant-occupied city to find clues about what happened to his squad. Personality: He never speaks (aside from grunts or a secret whistle) and is often shown sleeping or napping when not in combat, earning him a reputation for being remarkably calm under pressure. Lethality: Despite being "just a human," he survived the near-annihilation of his previous unit at New Jerusalem and single-handedly fought through hundreds of Covenant troops in New Mombasa.