Etri might oppose you. He might break your bones. He might cut your throat in your sleep or make the ground swallow you up. But he will never, ever lie about his intentions. He’s not a friend, Harry. But he is my ally. He’s good at it.— Molly CarpenterEtri is the leader of the Svartalves in Chicago and handles their affairs at this crossroad. Molly Carpenter helped him once with a bomb and the betrayal of the Fomor, which is the event that made them allies.
In the seriesEdit
In Bombshells, he welcomes Molly Carpenter, Justine and Andi Macklin at the reception given for the signature of the non-aggression treaty with the Fomors. Molly Carpenter discovers that the Fomors are going to detonate a magical bomb in their fortress, killing many people 
In Cold Days, after Mike Atagi delivered Harry Dresden's current vehicle, the Munstermobile, to Molly Carpenter's apartment, Etri personally requested a security sweep on it: screening for weapons, explosives, toxins and any kind of enchantment. Etri's security ran it under waterfall to wash away any tracking spells. It's the same procedure he uses on his own cars.