Sunanios Gilvatac was a thane in the Witenagemot of Kropasar. In August 2375, she was one of seven members of the Agreement Party who conspired to allow Montgomery Scott to steal the location of a Breen frigate from the Kropaslin multitronic computer core.
As a result of this act, which lead to the United Federation of Planets' rejection of the Kropaslin membership application, the Kropaslin government collapsed, leading to widespread chaos on Kropasar. By April 2376, it had been restored, with Gilvatac as the new high cyning. (SCE - What's Past eBook: The Future Begins)