Darth Ruyn

Darth Ruyn was an aged male Twi'lek Sith in the service of Darth Krayt. His last and best apprentice was a Twi'lek female that Krayt would name Darth Talon. As her final test, Krayt commanded Talon to kill her Master, a task which she did without mercy or hesitation.

Behind the scenes
Ruyn's name is most likely a play on "Ruin," although a separate Darth Ruin exists in the annals of Sith history. Repetition of names has been noted among Krayt's order, as with the case of three Sith to bear the title of Darth Wyyrlok, and the more similar case of Darth Nihl and Darth Nihilus.