Bendy the Dancing Demon, Bia the Sheepish Wolf, and Alice the Fallen Angel were the 3 main characters of the original Bendy cartoons. Bendy was a succubus who never actually learned anything naughty in her life, preferring to cause mischief. She was so annoying she got booted out of hell before going to demon school. She met Bia and they became best Buddies, living together on a farm. On the other hand, Alice had learned a thing or 2 about Lewdity and was stripped of her wings and sent to earth to bay for her sins. She met up with Bendy and Bia, and after a bit of panic, joined their friendship circle.
Barley, Charley, and Edgar. Aka: The Butcher Gang! These 3 would act as an old ex-pirate, old rich man, and a slightly younger circus performer respectively. They have a fear of demons and all try and capture/kill bendy at any chance, but all would fall head over heals for Alice.
Chester, Gaskette, Canoodle, and Dewey were a set of 4 who were past victims of Bendy's pranks. They would occasionally appear and chase Bendy around a bit, mostly being used as a scape goat if they didn't know how to end an episode or just needed a filler episode. The only reason there was 4 of them was so it wouldn't get too repetitive.