The Djinn Association, counter-part to the Hero Association, is an association run by Djinns, as the name aptly suggests.
They have various independently functioning arms, with the only thing common between them being that the are run and composed of Djinns.
They may be Guilds disguised as Hero Guilds, eg. Packhorse Master, or independent organizations such as the Evil Society.
They are involved in various activities like smuggling, human trafficiking, murder, and also act as mercenaries.
The Hero Association calls the top 9 ranked Djinns the "Nine Evils".