His commander was First Lieutenant Melissa McKay, and he headed one of her platoons. When the vessel was attacked over Installation 04, he, along with the rest of his men, made the jump to the surface aboard a Human Entry Vehicle.
Dalu was a commanding officer at Alpha Base and oversaw supply operations, Shade Turret placement around the base, and combat. He survived the Battle of Installation 04 until the ODST's captured the Truth and Reconciliation; he and they were killed soon after, when McKay destroyed the ship to prevent the virulent Flood from reaching Earth.
- Halo: The Flood (First appearance)