Therrus d'Lyrandar is impatient at the best of times; where possible, he'll use diplomacy or intimidation to get his way (and a high-ranked seal of the House can be pretty intimidating). He is generally good at pinpointing what needs to be done to finish the job; combined with his high rank in the house, Therrus is often domineering. These two traits make him an effective, though not well-liked, leader.

Therrus d'Lyrandar speaks formally, even around allies or when he's drunk, and though he does loosen up around familiar company, his speech never loses its formal tint. The impatient Therrus often paces, complains, or plays with the Prestidigitation cantrip when forced to wait (sometimes all 3). Often coming across as arrogant and just a little condescending, Therrus doesn't make friends easily.

As one of Baron Esravesh d'Lyrandar's top aides, Therrus generally dresses in the uniform of his House; a formal white-and-blue outfit. His dark hair is impeccably styled, and a blue Dragonmark is displayed prominently on the back of his right hand.