Thelashas

 was a young blue dragon that was bound by Halas to protect his manor. As an NPC, is played by Matthew Mercer.

Appearance
Thelashas was a young blue dragon with a rigid horn and pale blue eyes. Thelashas looked powerful, but surprisingly slender.

Halas
Thelashas agreed to guard a section of Halas' manner in exchange for treasure. He confessed to Fjord that one day, when he was larger, he would overpower Halas and take the entire manner for himself.