Daniel "Danny" Pearson is the former Director of Human Activities at MCC, due to being the son of MCC's executive Jack Pearson. Joe Caputo claimed him to be the Warden of Litchfield Penitentiary under a different job title.
Pearson is the son of a high-ranking staff member of MCC. This got him his job with no qualification; a trait which comes across with his unwillingness to make any changes to how MCC runs things.
Danny views his father highly and it isn't until Sophia Burset is thrown into the SHU under the guise of it being for her own protection that Danny stands up against him. This incident results in Pearson quitting, which leaves MCC to promote Caputo to Director of Human Activities, with a large payraise. However, this upsets the current staff of Litchfield, whose hours have been cut by half and pay slashed, with new, unqualified, untrained guards coming in. The current guards quit, leaving Caputo lost, or as Wanda Bell puts it, "leaving the monkeys in charge of the zoo."
Danny interupts Linda's panel at a convention to talk about problems at Litchfield, including the bad food and Sophia being in SHU. He shouts out a website, "DannyTalksTruth". He and Caputo are both arrested by a "Baltimore rent-a-cop."
Later, when Caputo uses Sister Ingalls' cell phone to take a photo of Sophia in SHU, he gives it to Danny who prints it off and brings Crystal Burset to MCC to show his father, getting Sophia released back into general population.