Religion: Taoist priest
First Appearance: Master of Kung Fu #41 (June 1976): "Slain in Secrecy, and by Illusion!"
Number of Appearances: 1
Worked for: Fu Manchu
We know that Kwan-Shu is explicitly portrayed as a priest. His role as a priest is the most important aspect of the character.
We have not yet verified that Kwan-Shu was a Taoist priest. We assume that he was a Taoist priest based on the fact that Shang-Chi is a Taoist and Kwan-Shu was Shang-Chi's priest when he was younger.
Kwan-Shu was also a servant of Fu Manchu, who is Shang-Chi's father. It is possible that Kwan-Shu was a priest a religious order built around Fu Manchu which might not properly be regarded as Taoism. But we have not yet read anything that supports such an interpretation.
Suggested links for further research about this character and the character's religious affiliation: