The traitor is

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Across
  1. 4. You wish you knew the
  2. 6. Our favorite poet
  3. 9. First Victim
  4. 11. Quoth the Raven
  5. 12. It's but a dream within a
  6. 13. Charles
  7. 14. Micky with a
  8. 16. My dearest
  9. 17. Devante
Down
  1. 1. Raven's mask is
  2. 2. When it rains it’s a perfect place like home
  3. 3. I am your
  4. 5. It's our home
  5. 7. Our master is
  6. 8. It's all about greedily
  7. 10. We come from the
  8. 15. Free as can be