Binder

Ernest Armand Tinwhistle, also known as Binder, is a hack wizard mercenary. He first appears in Turn Coat.

Description
He is a vicious mercenary who sells himself to the highest bidder. Dresden describes him as a "One Trick Pony". He excels at the summoning and control of beings from the Nevernever. He has been wanted by the White Council, but he is careful not to break the laws of magic, so they cannot capture him.

He is apparently English, due to the fact he speaks with a Cockney accent. He is described as a blocky bulldog of a man, and of medium height, but heavy, and muscular, with a slight bit of fat. His face is blunt and rounded, like "water worn stone". He has grey buzz-cut hair, and small, hard, green eyes.

Turn Coat
In Turn Coat, Binder is searching for Morgan, to get the bounty on Morgan's head. Some person, entity, or group advertised a wanted notice in covert language on Craigslist online. He had summoned around forty Grey Suits, which is what Harry nicknames the odd entities that were summoned. Then Binder has them chase Dresden and Murphy through a storage facility. Harry closes a circle around Murphy and himself and since the Grey Suits can't get at them there is a stand-off for a while. Molly and Morgan in a wheelchair sneak up behind Binder under a veil—Molly closes her own circle that cuts Binder off from his fae goons. Murphy chases and captures him, and then detained.

Harry and Murphy interrogate Binder down at SI. At some point Murphy grabs his hair. Murphy has to release him. Harry hired Vince Graver to tail him. Vince reports that he's on his way to the Hotel Sax. Harry and Murphy meet Graver in the Hotel Sax lobby; he tell Harry which room he's in and that he is with a woman and they ordered champagne with two glasses. Harry eavesdrops on him and Madeline Raith in their room at the Hotel Sax. in an uncanny way, Binder figures Harry has Morgan back in his apartment. He suggests that Madeline burn down Harry's building which would bypass Harry's wards and kill Morgan. Madeline says that she already told the White Council that Harry is hiding Morgan.

Near the conclusion of the book, he and Madeline Raith conduct an assault on Demonreach in an attempt to kill Harry and company. Harry eventually captures him after shooting him in the leg with his .44 Magnum. Harry lets him go, on the condition that if the two ever cross paths again, Harry will kill him. Current whereabouts unknown.

Skin Game
In Skin Game, Binder is part of Nicodemus' team and works together with Hannah Ascher.