As a descendant of the priestesses before the Great Awakening, Sybo was among the few with the ability to conduct the Argelian empathic contact, a method of discovering hidden feelings and the truth about crimes. The ritual resembles a séance as performed by Earth's 20th-century Spiritualists. Sybo employed the method to find out the truth about three murders in 2267, of which Montgomery Scott stood accused.
During the contact she felt the presence of the Redjac entity and spoke of it to the others, but before she could tell where the entity resided, she was killed by it, and again all evidence pointed to Scotty. (TOS: "Wolf in the Fold")