Dimitri Lousteau was a member of the Klaww-gang and the first boss to be fought in Sly 2: Band of Thieves. He later joined forces with the Cooper-gang in Sly 3: Honor Among Thieves and Sly Cooper: Thieves in Time.
He was voiced by David Scully.
Dimitri is an anthropomorphic marine iguana with purple skin and long, blue hair. He usually sports an orange shirt with a green jacket and pants.
As a child, Dimitri learned English by mimicking music-videos. As such, he uses a lot of street-slang, metaphors and strange phrases while talking. He also tends to give people nick-names, such as calling Sly "cracker box".
Dimitri is something of an opportunist, usually choosing whatever path or profession that works the best in his favor, with little concern for morals or principles. It was once stated by Sly that he has no honor as a thief, since he cares more about profit than challenges. This mindset is eventually though what caused him to join the Cooper gang, after he had seen how competent they were( Even though none of them really asked him to join them). His friendship with them grew stronger though, since they trusted him enough to give him The Thievious Racoonus and guard their hideout.
He also views himself as something of a ladies-man, as he tried to flirt with Penelope.
Dimitri was skilled enough to fight Sly in hand-to-hand-combat, and showed amazing speed when retreating.
In Sly Cooper 3, he proved to be an excellent scuba-diver and showed remarkable marksmanship with his harpoon-gun, to the point where he could defeat a mutated sea-monster created by Dr. M.