T'Hain was a Vulcan writer. The Dictates of Poetics is one of T'Hain's works.
In it, T'Hain says:
- "A characters actions must flow inexorably from his or her established traits."
Tuvok had quoted T'Hain when a holonovel malfunctioned in 2373. (VOY: "Worst Case Scenario")
- Although T'Hain implies a female name, by traditional naming paterns, we do not know if T'Hain is male or female.