Piper is the main character of the show. She ends up in Litchfield prison due to drug trafficking she did in her past with her ex-girlfriend Alex Vause. The show is based around her ability to adapt to life in prison. Picture reference (16)

Larry Bloom starts off as Piper's fiance in the beginning of the series. He is a freelance writer. Currently in the show he is having an affair with Piper's best friend. Photo reference (16)

Alex Vause was sent to Litchfield for the drug trafficking that her and Piper did. She is Piper's on and off again lover. Currently she is out of Litchfield because she named the primary drug lord behind her trafficking. Photo reference (16)

Sam Healy is a corrections officer and inmate counselor at Litchfield. At first he is very supportive of Piper, and tries to guide her and keep her out of trouble. Once Piper begins to see Alex again Healy turns on her as he is homophobic. In the second he tries to correct his mistakes with Piper. Photo reference (16)

Red was sent to Litchfield due to her mafia affiliation. She was the Head Chef in the first season, and ran a smuggling business out off her kitchen (non-drugs). She later gets fired as Head Chef and tries to take down her rival Vee. Photo reference 16

Nicky was sent to Litchfield because of her drug abuse. She has a huge sexual appetite and is often found having sexual relationships with many of the inmates. Photo reference (16)

Pennsatucky is sent to Litchfield for what is believed to be murder. In season one, she is the primary antagonist as she gets into conflicts Piper over religion. She works in the laundry room at the prison, and is a Christian. Photo reference (16)

George Mendez is a former correctional officer at Litchfield. He was corrupt when he was working there. This includes selling drugs, having inappropriate relationships with inmates, and so on. Photo reference (16)

John Bennett is a corrections officer at Litchfield. He has secret relationship with Daya, who ends up getting pregnant. He is one of the kinder guards in the prison. Photo reference (16)

Morello was sent to Litchfield for various reasons including: harassment, violating a restraining order, mail order fraud, and attempted murder. She works as the van driver for the prison. Photo reference (16)

Daya Diaz was sent to prison based on drug-related activities with her mother's boyfriend. She ends up having a sexual relationship with Officer Bennett and becomes pregnant. Picture reference (16)

Sophia Burset was sent to Litchfield for credit card fraud. She is the only transgender woman in the prison and works as the hairdresser there. Photo reference (16)

Taystee was sent to Litchfield for drug dealing. She works at the prison's library. She was let out of prison, but only lasted a few days before she ended up back in Litchfield. She claimed that the real world was too hard. Photo reference (16)

Currently we are unaware of the reason that Poussey was sent to Litchfield. She works at the library in the prison and has feelings for Taystee. Photo reference (16)

The reason that Big Boo was sent to Litchfield is currently unknown. She is a confident and sarcastic inmate, who suffers from anxiety and insecurities. She uses her size to intimidate the other inmates. Photo reference (16)

The reason for her imprisonment is currently unknown. Crazy Eyes is a mentally ill inmate who in season one develops an obsession with Piper. She allegedly has a violent past as well. Photo reference (16)