He is portrayed by Giancarlo Esposito.
He sells heroin. In many ways he is better than Corky. He is slow to get angry (except for when Fresh refuses to tell him whose sister is going out with).
In villainy, in many ways, he is like George Costanza on Seinfeld. He can be very nasty and hot-tempered.
He is capable of violence however, as Chili, one of Esteban's henchman, threatens violence against Fresh earlier if any drugs are missing from the count.