Observer 4 is an NPC that can be encountered in the elevator of a random megacity building during the Observation. He will tell the player that there is a phone call for them, which is later revealed to have been from The Insurance Guy. Attempting to attack Observer 4 will cause him to teleport away.
Observer 4 came into existence in the 5th Dimension. He joined the Observation Corp, along with 26 other Bulk Beings. Thus, like the other Observers, when the time of the Observation came, he would go throughout the Multiverse, searching for anomalies and documenting how things had changed. When he comes across the player, he patches in a call from The Insurance Guy, but then hangs it up, saying that it is a scam. If the player reports any anomalies to him, he will give them 10 Money Orbs.
Observer 4 appears to be a humanoid figure with light skin on his hands. He wears a black suit with a white undershirt and blue tie. However, instead of a head, he has the top half of a landline telephone. This is only how he appears in the 3rd Dimension, as it is impossible to see Observer 4's true 5th Dimensional form.
"What's with the awkward look? Haven't you ever seen a phone before?"
-Meeting the player.
"By the way, there's a call for you."
-Patching in The Insurance Guy.