This is a fascinating discussion. I've had some Catholic and ex-Catholic characters in roleplays, and dealing with their faith or lack of it is interesting. The first character in question, a lycanthrope named Jason, was raised Catholic, but was excommunicated after coming out as gay when he was sixteen. For a few years afterward he still clung to the beliefs for the most part, especially the Commandments, though he didn't bother confessing his sins anymore. His father Casper, on the other hand, continues to be a very devout Catholic. When Jason came out, Casper was extremely opposed, and is the one who pushed for the excommunication. But he mellowed out after a few years, and even came to accept Jason's boyfriend (who is bisexual and also an ex-Catholic, interestingly enough) as dang near family. It helped that they both saved each other's lives a time or two, too. When Jason accidentally turned Casper into a lycanthrope, Casper initially struggled with reconciling his faith and the supernatural nature of his disease. Then he met a vampire who had been Catholic too, but after hundreds of years he became more of a conservative Lutheran, taking up the habit of confessing his sins directly to God rather than a priest. That was an interesting conversation to play out.