A Senior Counsel is a meeting of the Head Counselors of Camp Half-Blood. The subjects they talk about include wars, prophecies, and quests. They are generally held around Mr. D's ping pong table in the Rec Room. Camp Jupiter's senate debates are similar to a senior counsel.
- Mr. D/Dionysus (camp director)
- Chiron (activities director)
- Quintus/Daedalus (deceased)
- Argus (head of security)
- Rachel Elizabeth Dare (Oracle of Delphi)