Jonathan Yossarian appears to be local. He's lived here before at least, from the sound of it. He's pretty inspecific about his past before his graduate studies at MIT.
Prior to that there was some exposure to the Seers, while some guy by some other name was on an unspecified mission in Beirut. This left a bad impression, but that wouldn't have anything to do with Dr. Yossarian.
He initially became one of the Obrimos heralds locally, which folded over to the Free Council. He liked it better when he could say he was the Voice of the Mighty, it sounded more fun.
He's a little paranoid, and a little messed up, and a lot ADD, and probably doesn't understand you.
He spent a few days as an apostate. Being an apostate is kind of easy, you just do what you want and nobody bothers to question you.
Somehow, he is now a Thearch. Got that robe and wizard hat, and some pointy shoes.
Has acquired a bashful but recovering border collie that he has named Wembley Rutherford Watson IV.
Wembley has been joined by a rescued Jack Russell terrier puppy named Zoey II.
By some strange aligning of fate, he became the Councilor for the Silver Ladder in January 2017, as well as taking up a leadership role within the local caucus.
Earned his robe as a factotum in February 2017 in an effort to grow into his emerging role. Mage Law!
Now the Deacon of the local Silver Ladder caucus as of May 2017 and no longer a Consilium officer.
Also took an apprentice.