Major Mitchell's story is like all too many who have survived the destruction of their world. Originally an inhabitant of Arcadia and a member of the UNSC Arcadian Militia, his wife and children were killed with the Covenant attacked Pirth City, leaving him emotionally devastated. For a long time, their loss left him with suicidal tendencies, but after therapy he was cleared for continued service, and even managed to pass the requirements for the ODST. AMong the Helljumpers, he found a new reason to keep living - the deaths of as many Covenant as possible, as painfully as possible. Serving as the XO of the 506th ODST Force Recon Battalion, Mitchell works with Colonel Forrester and Glaurung in the units operations, and handles the logistical side of operations.