From Halopedia, the Halo wiki
The Recon Pilot is the designation for a specific Phaeton pilot that Spartan-IVs combat in Warzone simulations.
The Recon Pilot is featured as a mini-boss in the Battle of Noctus training simulation. Killing one will award the team 25 VP, and earn the player a Boss Takedown medal.
In Warzone Firefight on the map Temple, in round three, the Recon Pilot flies a Phaeton Helios.