The hierarchy of the Pack is based on wolf packs, with the leader being referred to as the 'Alpha' They follow rule of 'survival of the fittest'. Like with certain animals, think for example of peacocks, they use their colorful and outlandish looks to boast.
It is common for its members to challenge the reigning Alpha to win the title, which ends with the winner remaining as the dominant of the Pack, this usually means that the Alpha is the most violent member, but not the most capable leader. As Pack law forbids killing other members, the losers are generally shamed and then exiled.
The members are identifiable by their colorful outfits and bizarre face paints. Most members wear masks depicting an animal.
The Pack feeds the carnivorous animals they keep with human remains, evidence for this can be found in the Nuka-Town backstage.
The Pack are one of the gangs the Sole Survivor can choose to help during the Nuka-World add-on. They can do odd jobs ranging from slavery to murdering informants of other factions, and help give them new territories around the park as well as giving them settlements in the Commonwealth. Depending on the ending for the raiders; they can either remain allies or end up being the final bosses with the Operators and the Disciples helping you eradicate them.
Alternatively, they and the two other raider groups can be destroyed in Open Season.
Pack faction armor offers a fair amount of well-balanced protection akin to combat armor, but is about half again as heavy. Though slightly weaker than Disciples or Operators armor, their gear can still surpass heavy combat armor in terms of protective qualities. Since every single gang member is equipped with at least a few parts of their armor, it often means that even the most basic Pack fighter boasts better resistances than raiders or Gunners of much higher levels. This, coupled with their powerful weaponry, makes them a lot more dangerous than their Commonwealth counterparts regardless of player level.