My had three companions for my first run through. The first one left me pretty early in the game after going through the few couple of portions. I hung with the second one from the tail end of the desert until I couldn't keep up with him/her on the climb up the mountain. I thought I was going to end the journey alone until I somehow met with someone at the end of the game.
Liked the journey, though I would've liked it better if I had a companion that stuck around with me throughout the entire journey.