I see... this is an odd thing to say, but maybe Zun should be blocked out of the character editor unless the player has Charlemagne? That's the case with Buddhists, Jewish etc. I've made an entire "unplayable" empire of Zun by now![]()
In general the only Zunist characters are in 769, so I'm guessing that you used the Ruler Designer to play as them?
In general if the only thing you're missing is the Trial of the Sun you're not missing much. Reforming the faith, getting the +20% (?) Heavy Infantry bonus, etc are all much more important.
I'm guessing it's sort of like playing Orthodox without Legacy of Rome. You can do it, but you don't get a lot of the flavor...