May 7
"Well well well what do we have here? Creators and watchers exploring the aus? How wonderful! I suppose I should make my entrance to you wonderful companions from beyond!"
Meet stopwatch sans aka stopwatch the controller of time in the multiverse (inspired by timekeeper cookie). He's responsible for starting time in newly created aus and stopping time for when they get destroyed.
"every possibility in every universe is seen by my eyes and my eyes alone"
He's considered insane and has a fondness for those who aren't bound to an au that he can see the timelines for