Etri

Mr. Etri is a Svartalf and an ally to Molly Carpenter. He is first mentioned in Cold Days.

Description
Per Molly: "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 my friend. But he is my ally. He's good at it."

In the Series
In Cold Days, after Mike the Mechanic 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 next ran it under waterfall to wash away any tracking spells. It's the same procedure us uses on his own cars.