Tynan is a Breton Reachman and a member of the Forsworn who lives in Markarth. He is one of Nepos the Nose's two servants.
Tynan is always found in Nepos' House. He does little except take care of Nepos. Tynan offers no unique interactions with the Dragonborn except generic dialogue.
Tynan is a Forsworn agent working with Nepos. Once the Dragonborn has completed their dialogue with Nepos, Morven, Uaile and Tynan will turn hostile and attack.