Companions

A companion is another player-controlled Wayfarer. Companions are typically met randomly while playing online, and are more-or-less anonymous until after the credits. A player may only be connected to one other player at a time.

Conditions for Meeting

 * Major events - such as releasing a dolphin - must be the same for both players. For example, if the first part of the bridge is repaired for one player, then it must be repaired for the other player, too.
 * Players must have a reasonable amount of distance between each-other - about two War Machines worth.
 * Players must be in the same "lobby." A lobbies are virtual "rooms" that the players are divided into in order to better manage the load, in case there are a lot of players online.
 * First-time players will (almost) never meet a White Cloak.
 * They're not supposed to meet, but there have still been reports of it happening on rare occasions.

If two companions disconnect from each-other, the game will try to reconnect those companions.

Companion Pointer
If you are connected to a companion and they are not in your line of sight, a white glow will appear at the edge of your screen. The direction of the glow points you toward your companion, while the intensity of the glow helps you know how close they are. If your companion is far enough away, it may be hard to see the pointer.

Playing with a Friend
While the connection is meant to be random, players have found ways to encourage the system to match them with a specific person. While there's a chance that the players may still meet with someone else, or that there will just not be any connection, the odds of meeting the person you want can still be increased dramatically.

If, after using all the tricks, the players still don't connect after around a minute, it could be that they're in different lobbies. If this occurs, it's recommended that one or both players re-enter the level and try again.

https://www.youtube.com/watch?v=3krjaWyn9pc

https://www.youtube.com/watch?v=hSoGx4qUq74