Religion: Catholic nun
Name: Sister Joan of Arc
First Appearance: Impure Thoughts (1986)
Number of Appearances: 1
Actress Randi Layne was cast in the role of "Sister Joan of Arc" in the 1986 film Impure Thoughts. I believe this is simply a nickname that the four Catholic school boys who are the main characters in the film used to refer to a nun at the school they attended. But much of the film takes place in purgatory, so it is possible that the characters actually meet the historic Joan of Arc. I think the former theory is more likely, however, because the character's name in the cast list is "Sister Joan of Arc" and not simply "Joan of Arc."
Suggested links for further research about this character and the character's religious affiliation: