Team Good
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Percy Jackson, Grover, and Annabeth: Masons - you stick together no matter what. you defeated the Titans together, you can certainly keep out a few monsters
Rachel Elizabeth Dare: Seer - the power of the Oracle of Delphi will help you discover who let the monsters into Camp Half-blood.
Chiron: Baner - you want to protect the camp, but also you don't want any campers dying unececarily.
Half Bloods: Vilagers - you don't want to die.
Team Evil
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Luke Castellan: Devil - your time at Camp half-blood gave you connections with the campers.
Atlas: Beast - to defeat Atlas, someone has to hold up the sky for him.
Monsters: Wolves - you were let into camp by Luke and now you can kill the campers.
Team Neutral
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Nico Di Angelo: once per night (If anyone is dead.) you can raise them from the dead to join your team. If someone attempts to kill you, one of your creatures will die at random instead.
Win: when I send you your role PM, respond choosing a side to join. you ally with them and share their win condition.