Let's say I found a religion early and convert Spain (Phillip II). Will Phillip remain a religious fanatic, but spread my religion instead?
His description says he "Likes civilizations who follow the same Religion as him, and wants his cities to all follow the same Religion".
Can I expect that, at the very least, he will use missionaries, apostles and inquisitors (which have a special trait from Phillip: "eliminate 100% presence of other Religions") to keep his own cities following my religion?
That would be neat. But if it's not the case, I'd like to know, perhaps I should keep a closer eye on the civs I've already converted.