Some unexpected (recurring) minor characters in this book:

My tendonitis
The 38 Geary bus (SF)
Tefillin
The Yiddish-speaking guys at the back of my old shul
The first boy I ever fell in love with (though I bet he gets edited out)
Burning Man attendees, broadly defined

Some more expected (recurring) characters in this book:
Shabbat
The prayerbook
The friend I’m calling Alex
Thomas Merton
St. Theresa of Avila
God