Ogre

Ogres are wyldfae. They first appear in Summer Knight.

Description
Ogres are Wyldfae and may side with either Winter or Summer Court.

Large thickly muscled humanoids with large hands and feet, they are also strong and surprisingly fast considering their size.

Their personality ranges from jovial to malicious, and is always violent. Among the Summer Fae, ogres act as muscle and enforcers; few are considered intelligent or self-reliant enough to work alone or without direction.

They are resistant to magical fire but not to natural fire, and like all Fey they are vulnerable to cold iron.

Snow ogres
Snow ogres are as big shaggy things with white fur and long claws. Harry Dresden informs Thomas Raith they were some kind of ogre and calls them to himself "snow ogres". It is unclear whether anyone else calls them that.

Summer Knight
In Summer Knight, Harry encountered an ogre named Grum at Ronald Reuel's apartment. After his encounter, Harry ponders on Grum and his differences to the average ogre: old, strong, smart, constrained, and quick. He was probably a trusted personal guard.

Proven Guilty
In Proven Guilty, snow ogres chased Harry Dresden and his rescue team out of Arctis Tor as they made their escape back through the rift after saving Molly Carpenter. Harry and Thomas Raith wage battle with them while the others get through the rift. Fix, the Summer Knight, aids their escape.

Cold Days
In Cold Days, a snow ogre was one of Redcap's backup thugs at Harry Dresden's party in Arctis Tor, who immobilizes and then attacks Sarissa. Dresden destroys him for this.

Trivia

 * The first appearance of the word ogre is in Histoires ou Contes du Temps Passé. It later appeared in several other fairy tales of the same author.