George "Pornstache" Mendez (or better known as Pornstache) is the recurring antagonist in Orange is the New Black.
He was portrayed by Pablo Schreiber.
Pornstache is a corrupt, perverted, argumentative, and seemingly psychotic prison guard who frequently abuses his authority. He seems to be the most ruthless and impatient of all the COs and is seen sexually assaulting and humiliating the inmates at every opportunity as well as repeatedly targeting Sophia with nearly simultaneous transphobia and sexual advances.
His personality can be both laughably exaggerated as well as frightening. He is put on unpaid leave after being set up by Daya and caught having sex with her. Mendez is shown to be in love with Daya and often sends her love letters anonymously after he leaves Litchfield.
Officer "Pornstache" Mendez was a crooked corrections officer. He has a very close undercover relationship with Bennett and the two are often seen together. He secretly smuggles drugs into the prison with the (forced) help of Galina "Red" Reznikov.
He feeds prisoners' drug addictions by trading drugs for sexual favors, as seen with Tricia Miller and Leanne Taylor. He also carried on an affair with Tricia Miller, giving her drugs for sex.
His drugs led to her addiction behind bars and eventual overdose and death, which he framed as a suicide. He is mean, crude, careless and constantly harasses the inmates. He pursues an affair with Daya Diaz, an inmate after she realizes her pregnancy by Bennett.
She and her fellow inmates, in an attempt to pin the pregnancy on him, get Caputo to catch the two having sex in the supply closet, resulting in his suspension. After his encounters with Daya, he speaks constantly about his love for her, which he believes to be reciprocated, to Bennett. Through this, Bennett, his only contact within Litchfield and the father of Daya's child, develops a discreet hatred for Mendez.
In 40 OZ of Furlough, he returns from his suspension under Figeroa's orders, who feels the prison is understaffed. In Little Mustachioed Shit, Daya is finally revealed to be pregnant and Caputo's claim that Mendez had sex with an inmate is supported leading to Mendez's subsequent termination and incarceration. Caputo himself takes great pleasure in first firing Mendez and then revealing he is to be incarcerated. As he is escorted from the prison in front of all the prisoners he loudly declares his love for Daya.