Kenoes (Areimancers)
People who are Universe jumpers. They're originally called "Areimancers", and long ago-- "Unimancers".
Kenoes are usually jumping Universe to Universe for a specific reason; Whether it's searching for something, or to look for a place to stay for a while.
Though some usually just do mischief...
And it's usually up to certain Areimancers to fix the anomalies.