Tahna was a female Tomol living on the island of Suba on the planet Arethusa in the late 2260s.
In the year 2269, Tahna was born to Nimur and her mate Kerlo, shortly before her mother was to undergo the Cleansing ritual. She was named after a friend of Nimur's and Kerlo's who had been claimed by the Cleansing. (Seekers novels: Second Nature, Point of Divergence)