A character (bonus points if they were previously shown to have little to no regard for religion, if their religion is discussed at all) experiences something big, drastic, or life-changing. Maybe they just lost all their life savings, or maybe they saw someone commit suicide. Or maybe they just felt really, really bad. Whatever the case, these characters have a tendency to turn out extremely pious by the time they're done with the necessary soul-searching.
Sometimes an indicator of Break the Haughty
. Taking the Veil
(still in YKTTW
) is a subtrope.