Religion: manifestly non-religious
Name: The Beast
First Appearance: Strange Tales (vol. 1) #1 (June 1952): "The Beast"
Creators: Manny Stallman
Number of Appearances: 1
Note: evil man regressed into ape, put in zoo
"The Beast" is about an evil man who is subjected to experiments which regress him into an ape. He kills the scientist who experiments on him. Legal authorities then capture this man ("the Beast") and put him in a zoo.
The story illustrates that doing evil causes a person to lose their soul, turning them (in this case literally) into an animal.