Ranger Elite

The Elite Ranger rank which serves as highly skilled Fleet Security soldiers who focus on extra-vehicular activity (EVA) warfare. While capable of fighting in most theaters of war, their specialized in zero gravity combat.

Halo: 2
During the mission of Regret in Halo 2, two Rangers will fly about and shoot the player as an effort to try and stop John 117 from reaching to the High Prophet of Regret. These Rangers are also assisted with Drones sometimes if some are still alive and have to be eliminated to carry on. Also during the mission Gravemind, Rangers can be seen throughout the level.

Halo: Reach
They first appear on Nightfall, were multiple Rangers appear and can be killed. They return in Long Night of Solace, where Rangers guard Ardent Prayer and must be killed to process through the level also the Rangers are assisted by Ultra Grunts. During New Alaxandria, Rangers can spawn in some of the locations of the level. They finally reappear during the level, Pillar of Autumn, where they assist the Covenant forces which were outside the cave full of Drones.

Halo: 4
In Halo 4, several Rangers appear and are assisted by the Ranger Jackals.