Hmm....I think yth684 means this guy:
I *think* he's a Muslim.
As usual you're absolutely on it, Lamkin. I had forgotten about the guy in the tower. (when replaying I've become lazy and just rush to get the pattern that brings the Rabbi down out of his perch)
And I agree about that guy in the turban being a Muslim (the big tip off is the crescent moon just over his head!)
And then the last lady is a Buddhist?
I've looked and looked but can't find any obvious clues as to what her beliefs are, but she's definitely a "devotee" of The Infinity Symbol... whatever that means in the world of Machinarium.