You can add the special role to whatever role you already have unless it conflicts with their role, for example a leader can be a prophecy cat but not the Traitor.

//The Prophecy Cats: These cats were the ones who survived the journey to the Sundrown place. They have a special connection with each other, and don't see clan boundaries.
Taken: 4/4
Reserved: 0

//The Siblings: Two siblings with a special connection to each other, can feel what the other is feeling.
Taken: 2/2
Reserved: 0

//The Traitor: A warrior who is secretly training in the dark forest and planning to kill their leader. Has complete control over the Blasphemer.
Taken: 1/1
Reserved: 0

//The Blasphemer: A medicine cat who doesn't believe in Starclan, and because of this has a much more level head than other cats. Became the Medicne Cat due to the Traitor's meddling. Very insecure that their secret will be discovered, will do whatever the Traitor asks.
Taken: 1/1
Reserved: 0

//The Lovers: Two cats whose love is forbidden (maybe a medicine cat, and a warrior, maybe warriors from diff. clans, you choose)
Taken: 1/2
Reserved: 1