Tadia was a member of the Sen Ennis.
She studied plant medicine prior to being imprisoned on a moon the Olt star system by Tevlin-De. With the nanites resurrecting those who died, there was no need at the time for Tadia to continue her medical career. This changed when the Ennis and the Nol-Ennis agreed to a ceasefire. In 2373, Tadia treated Raiq. (DS9 novel: Rising Son)