Former Enemies of the Secret Bureau of Monster Hunters, Occult Detectives and Paranormal Investigators
Characters and sometimes creatures who were enemies with the Secret Bureau of Monster Hunters, Occult Detectives and Paranormal Investigators but eventually became good and/or allied with them to fight greater evils, some times even becoming official members of the group
check out my other versions of this list on comic vine and listal
https://www.listal.com/list/allies-former-enemies-sbomhodapi