He is alone which is very strange for a First One. Nobody knows what he is doing there, which is the reason that the secondary base sends the player to him to deliver a message. After receiving the message, he will just say: "Do not interrupt me. I'm busy."
In the sixth mission, of the secondary base, he disappears and a mechmind with the name FIRST-114. spawns near the anomalous zone 2, north of the base. Storywise both mechminds play the same one, but they have differences in the actual game, like a different armor, energy-shield and heavy weapon.
For the player, this mechmind will always stay friendly, as long as he won't get too much damaged by him.
- FIRST-114 has following death-message: "You should not have done this. My job here is not yet complete."