Wendy and Marty Byrde have been married for close to 20 years. Together they have 2 children, Charlotte and Jonah.
Wendy was raised in North Carolina, and used to have a very strong accent. She grew up in a poor, church-going family. In her teenage years, she got heavily involved in drugs and alcohol, and even had abortions. She confessed this to her pastor and was rejected by him, causing her to question her faith and split from the church.
In Season 1, Marty and Wendy's relationship is strained as he has found out that she is cheating on him through a private investigator. They decide to stay together for the kids and Wendy helps Marty pack up everything overnight to move to the Ozarks after the cartel's threats.
Wendy helps support Marty and come up with creative ideas to launder money, while they're in the Ozarks. Wendy starts working with Sam Dermody at the realtors office after a few weeks in the Ozarks. Before, she used to be a public relations consultant on political campaigns before moving to the Ozarks.
Eventually, Wendy ends up being a principal partner in Marty's scheme. She is ruthless and conniving and knows how to get things done. She helps manipulate Charles Wilkes to their advantage in Season 2.
In Season 3, Wendy starts to become a major player in the cartel scheme. She starts making decisions without Marty and starts to build a friendship with the cartel lawyer, Helen Pierce. Wendy even starts having private phone calls with Omar Navarro himself, despite Marty's concerns.
When Wendy's brother, Ben Davis, moves to town he starts to stir up trouble for the Byrdes. He has bipolar disorder and goes off of his meds, giving great concern to Wendy and Marty because they know that he can cause danger to himself and others. Once Ben learns about the cartel business, he confronts Helen and her daughter Erin, telling Erin what her mom really does for a living.
Helen wants Ben dead as revenge, but Wendy tries to avoid this by taking him on a road trip to find a place to hide. Once she realizes how unreliable Ben really is, Wendy turns on her own brother and calls Helen to tell her where he is. Ben dies and Wendy goes into a temporary depression, wondering if she made the right call.
At the end of Season 3, she and Marty fly to Mexico with Helen to see Omar Navarro. Navarro unexpectedly shoots Helen, showing his allegiance to the Byrdes.
Evil comes when the righteous path is so hidden, it just looks like there’s only one way out.