The Spiritual was a man they recognized immediately. With the numbers of participants going down, those left were beginning to get more and more of a spotlight placed on them. This man was among the number almost certainly guaranteed to be among the finalists although he, himself, was not part of the Council Members.
He was known as Rowan Frostwind, a Pure Blooded Spiritual.
In truth, his talent and strength was beyond that of Lyra Emberheart. As for why Lyra was given the rights to become a Council Member while he was not, this was more related to Leonel than it was to any internal strife or unfairness.
According to the original plan, the Council was going to put pressure on Leonel and that was something the Spirituals alone couldn't fix. But Lyra was going to become the lynchpin for relieving some of the pressure on Leonel, giving him a path to survival.