Tavish is a member of Keenan's Summer Court and serves as one of his closest advisors. He is acknowledged as the oldest of the King's advisors and seems to suffer the most from the curse (with the exception of Keenan and Donia).

Keenan notes Tavish served his father, the prior Summer King, so Tavish remembers -- and longs for -- the previous glory of the Summer Court. After centuries waiting and hoping for the arrival of the Summer Queen, Tavish has become very serious and in tight control of his emotions. This prompts Niall to worry if Tavish doesn't become more emotional and animated -- as opposed to dour and controlled -- he'll end up a part of the High Court.

Tavish is a tall, elegant summer fey; Aislinn describes him in Chapter 11 of Wicked Lovely: 'If she glanced at them quickly, they looked like they weren't much older than her, but the taller of the two had a strange solemnity that made Aislinn suspect he was old. He had unusually long hair for such a serious demeanour; under his glamour it glittered like thick silver cords. A smallish black sun tattoo was visible on the side of his throat, exposed by his tightly plaited hair.' Aislinn first encounters him at her high school, posing as one of Keenan's two "uncles."

Tavish is literally and figuratively "old school" in his attitudes. He has a narrow and somewhat mysoginistic view of women in general, and mortal girls in particular. He implies on more than one occasion women/girls are good for only "one thing," saying "being friends is not what girls are for."

In discussions on how best Keenan can persuade Aislinn to be the Summer Queen, Tavish's advice to Keenan is to use whatever means necessary to compel her to take up the staff and assume the role. Tavish condones and supports Keenan's efforts to tempt Seth with female fey, and in so doing, showing Ash she can't trust her friend.

Keenan feelings of urgency and desperation over restoring the Summer Court are reinforced by Tavish. When Donia tells Keenan Beira has asked her to cheat at the game and keep Aislinn from touching the staff, Keenan asks Tavish for advice. The older fey says just hearing Beira fears Ash is enough to give him hope.

His advice to Keenan on how to influence Aislinn to become Summer Queen is chilling and indicative of his overall attitude: "Make her agree . . . do whatever you must, even if it is . . . unpalatable to you or her."