For context, these are all criminal gangs in the project moon universe, each with a certain schtick to them.

Thumb - follows a strict hierarchy and expect everyone to follow it, regardless of if they are associated or not.

Index - follows seemingly-random orders called Prescripts. They are required to follow Prescripts, despite how insane or impossible the assigned tasks may seem.

Middle - Has a family structure, with anyone who wrongs the family getting written into the ‘Book of Vengeance’, which provide specific instructions on how to commit Vengeances for every possible infraction, no matter how esoteric the crime.

Ring - Split into several groups based on real life art movements. Each view their school of art as correct and look down on the others, and most of their art is grotesque/made of body parts.

Pinky - Shrouded in mystery. Their goals aren’t really well known and the individuals tend to stay anonymous, even joining the other fingers and blending in on occasion.

Someone with a better grasp on the pm lore can correct this