Halo: Reach

Ardo 'Moretumee

A Sangheili who was the Shipmaster of the heavy corvette Ardent Prayer during the Human-Covenant war.

Auntie Dot

The UNSC AI assigned to assist Noble Team during the Fall of Reach, Dot plays a role in Halo: Reach similar to that of Cortana from the main Halo trilogy.

Beta-Red Actual

Cortana

Cortana is an artificial intelligence construct who accompanies the Master Chief throughout the Halo trilogy and Halo 4.

Dr. Catherine Halsey

Dr. Catherine Halsey is a civilian scientist in the UNSC. She is the founder of the SPARTAN-II Project and was responsible for the recruitment of Master Chief. She is also the biological mother of Miranda Keyes, but distanced herself from her daughter her whole life.

Edward Buck

Gunnery Sergeant Edward Buck was the leader of a special ODST squad and one of the main characters in the Halo spin-off Halo 3: ODST. He is heavily inspired by Captain Malcolm "Mal" Reynolds, his voice actor's character on the cult classic TV show Firefly.

Emile-239

A Spartan-III Part of Noble team. Height 6`10 Weight 234 lbs Born 3/11/2523 He also goes by Noble Four. He works in Commander Carter's group of Spartans.

Kat-320

Catherine-320 is a member of Noble Team in Halo: Reach and a Spartan-III. Her right arm is cybernetic, due to a war injury sustained protecting Carter-259. Kat and Carter are the last remaining members of the original Noble. Her callsign is Noble Two.

Marcus Stacker

Master Sergeant Marcus P. Stacker is UNSC Marine Shock Trooper that first appeared in Halo: Combat Evolved.

Master Chief

Master Chief Petty Officer John-117 a.k.a. "the Master Chief" is a SPARTAN-II Commando and is the cybernetically and surgically enhanced super-soldier protagonist of the Halo series.

Spartan-312

The protagonist and playable character of Halo: Reach, Spartan-312 is a Spartan-III supersoldier-commando assigned to Noble Team as Noble Six right before the fateful Battle of Reach.