Spectator

Spirits, often called spectators due to the knowledge of their presence but inability to perceive or interact with them (in most cases), haunt all the realms but reside in the Beyond most prominently.
In the End, due to its proximity to the Beyond, there are very strong ties to the spirits that reside there.
The Enderian rules for interacting with spirits are as follows:

1. Respect is owed to all spirits, and a healthy amount of caution.
2. Be careful when making deals with spirits, of any sort. They are known to leech memories and even respawns if one is not careful, whether or not the spirits mean to maliciously.
3. Do not interact unless interacted with first. To stare is rude no matter the state of being.
4. Never taunt the dead with your state of living. That can change very quickly.

In the Nether, there is no clear access to the Beyond. Only when reaching the nether roof, demonstrating a level of power and cleverness, can the Beyond be seen. But that is not to say the spectators are not felt and recognized. Spectators, its believed, can travel through any medium, any block, any material, and will stick with their clan and their ties.