Escort Seven

"Escort Seven" is a name in unused dialogue, used to refer to an unseen Federation Marine character in Metroid Prime 3: Corruption. Upon approaching the G.F.S. Olympus, Escort Seven contacts Samus through the transmission console in her Gunship and asks her to transmit her identity code. Once she has done so, he welcomes her on the Federation's behalf, and instructs her to land her Gunship in Docking Bay 5. He is not heard from for the rest of the game.

It is likely that the name "Escort Seven" refers to a Stiletto-class fighter in the Seventh Fleet, which is classified as the seventh of the fighter ships, rather than the individual soldier's name.

Dialogue
The name "Escort Seven" originates in an unused line that has no audio file attached to it: "G.F.S. Olympus, this is Escort Seven. Requesting docking bay clearance."