Roads Diverge

Speak with the All-Mother, and then go see Rhubarb on the frontline in the Ambrosia Valley.

I advise you to leave the Expedition base as soon as possible. You are not welcome here, to put it mildly.
We will disconnect you from the portal network, although I understand that you can return to Sarnaut with the help of the All-Mother and Skulnar.
But there is nothing else for you here at the Gates Base.
We will deal with the Children ourselves, and you can return to the All-Mother and see if she's happy to have a new supporter...

I see the All-Mother was right to trust you. Since you are on our side, now I recognize you as an ally and a friend. So be it. You are one of us.