UNSC Monitoring Station Delta Five

"Cleo. Overseer, UNSC Monitoring Station Delta Five, Pluto. I am with Cortana."

- Cleo declares his allegiance.

UNSC Monitoring Station Delta Five is a United Nations Space Command facility orbiting the dwarf planet, Pluto, in the Sol system. In October 2558, the station's overseer, a smart AI known as Cleo, defected to the Created.

List of appearances

 * Halo 5: Guardians