Scio Marses was a Bajoran in the 24th century. Scio was a Vedek.

In 2376, Vedek Scio was one of the highest ranking Vedeks in the Vedek Assembly. In April of that year, Scio attended a secret meeting with six other high ranking Vedeks to discuss what they should do to keep the recently discovered Ohalu Prophecies, which the Assembly considered heretical, under wraps. In the meeting Scio suggested opening the matter to entire Assembly. (DS9 novel: Avatar, Book One)

Vedek Scio was a follower of Yevir Linjarin. (DS9 novel: Cathedral)