Halo

Pablo Schreiber

Master Chief, Spartan-117 / John-117

Natascha McElhone

Dr. Catherine Halsey

Joseph Morgan

James Ackerson

Shabana Azmi

Margaret Parangosky

Christina Bennington

Cortana

Natasha Culzac

Riz-028

Olive Gray

Dr. Miranda Keyes

Yerin Ha

Kwan Ha

Bentley Kalu

Vannak-134

Kate Kennedy

Kai-125

Charlie Murphy

Makee

Fiona O'Shaughnessy

Laera

Cristina Rodlo

Corporal Talia Perez

Danny Sapani

Jacob Keyes

Jen Taylor

Cortana (voice)