The Advisory Council
Basically your Alpha's. The Advisory Council are the leaders of the pack, and are the ones to go to if any assistance is needed. When going to battle, they are the first responders to assess the situation, and determine whether or not they can talk themselves out of battle, or if a battle has to happen. If the pack is under attack, they are the ones to give orders for attack. Their word is law, despite if it's in the set rules or not.
Mori (Scout)
Radiation may have chased off most rival packs, but this does not mean they are not a threat, thus, Mori are sent out into the territory to look for any dangers that may pose a major threat to the pack. If a threat is found, the lead Mori reports to the council right away, who then decide which action to take to get rid of the threat.
Kai (Hunter)
As the meaning of the title states, Kai's are the ones who keep the pack fed. With so many mouths to feed and so little prey left in the world, Kai's are constantly out of the run looking for food to bring their pack members. Because they work so hard, they are among the first to eat along with the council.
Reku (Guardian)
The second responders to any threat the pack may face. Following right after the council, these wolves are not afraid of death, and will do anything to protect their fellow pack members. If a threat cannot be handled, the Elite Reku sends for help from the other pack members. They vow never to back down in battle until they are downed, or they are the last one's standing.