Agent Sidh was an assassin in the Department of Mary Sues. Sidh's name means "peace" in Sindarin, a fact that she blames on her parents being slightly loopy when they named her. She was partnered with Caitlin. Sidh was written by Vana-Eireen. Sidh managed to impress veteran Agent Caitlin on their first mission together by not immediately cowering from her somewhat abrasive temperament, but rather speaking up for herself.