- "Holy hell that thing's large"
- ―Private First Class Walker Reins
The Citadel-Class Forerunner Frigate is a Forerunner ship used for troop deployment and assault Prehistoric Human ships during the Human-Forerunner war.
The ship is of unknown design and has oddly placed weapons leaving the back of the ship unarmed and unprotected, but this is possibly due to the back being the most armored and that the Frigate would attempt to sneak on to any target and fire in to it.
- "There goes 8th Fleet..."
- ―Admiral Serin Osman
- "There is no way we are engaging THAT ship"
- ―Lieutenant Kagran
- "Me think bad idea attacking big ship"
- ―An Anonymous Unngoy Minor