Mayor Theresa Davis first appeared in "Racing Hearts" where she oversaw the Royal Woods Astonishing Quest. She also had Lynn banned from this year's event because of her roughhousing and competitive nature last year. Mayor Davis stated that the winner will get a trophy to commemorate their victory. In addition, she also carried around a keyboard that she got for her kids. When Scoots and Helen won the final challenge, it was discovered that Helen was Lynn in disguise. Mayor Davis recognized Lynn and chased after her and Scoots to get the trophy back.
In "Last Loud on Earth," Mayor Davis broadcast a storm warning advising all citizens to get to the Royal Woods Mall as Lincoln and Clyde were watching the "Swarm of the Zombies" marathon in Lisa's Underground Bunker. Her voice was heard on the radio advising the stragglers to get to the Royal Woods Mall until she is interrupted by Lola shouting to Lincoln and Clyde to do that until Rita scolds Lola for interrupting Mayor Davis' broadcast. Mayor Davis came out with the rest of The Loud Family, Bud Grouse, Katherine Mulligan, and Seymour where Rita stated to Lincoln and Clyde that they are attacking Lynn Sr., Howard, and Harold who were looking for them and wore their voices down. When Lisa is among those that heard where Lincoln and Clyde were and asked how they got into her bunker, Mayor Davis is among those who state to Lisa that her password is her birthday. When Lynn Sr., Howard, and Harold denied going to the Burpin' Burger, Mayor Davis and everyone present suspected that another person went there as the final scene shows Flip eating raw hamburgers.
In "Pet Adoption Day with Lana Loud", Mayor Davis is among the people that wanted to adopt a pet from the Royal Woods Animal Shelter. She showed interest in a German Pinscher named Rocket as Lana had her do a run-in-place exercise since German Pinschers are working dogs. Mayor Davis got exhausted and left. After Lana made some apology calls, Mayor Davis finally got Rocket and allowed Lana pay visits to Rocket whenever she can.
In "Electshunned", Mayor Davis is getting ready for the upcoming mayoral election when her intern Leni suggests a few ideas for the campaign, but her campaign manager Vic regards Leni's ideas as terrible. Under the Loud family's advice, Leni runs for mayor against Mayor Davis and easily wins the crowd over with a promise of a shopping day with no taxes. During the course of the campaign, Mayor Davis and Leni attempt to expose dirt about each other, but after Leni's lies about Mayor Davis get the crowd only riled up, Leni ultimately admits she is lying, causing the crowd to turn on her. Mayor Davis wins the election, but is inspired by Leni's honesty, fires Vic, and adopts her idea of a no-tax shopping day, allowing Leni to cut the ribbon.
In "Zach Attack", Mayor Davis is asked by the people of Royal Woods what she plans to do about the aliens that arrived in Royal Woods.
Mayor Theresa Davis is a slender woman with a very big chin, and thick bottom half. She has dark skin, black hair tied up in a pom pom on the top. She wears a pink collared suit with a while collared shirt underneath, a yellow necktie, purple eye shadow, white hoop earrings, red lipstick, and white high-heeled shoes.
As the Mayor of Royal Woods, Theresa Davis places the safety and concerns of the town's citizens before her own, shown when she advises everyone to take refuge at the Royal Woods Mall during the storm. She is shown to get mad when she gets tricked as seen in "Racing Hearts."
Mayor Theresa Davis gets along with most of the people of Royal Woods.
Mayor Theresa Davis has personal issues with Lynn Loud, having formally banned her from the annual Royal Woods Astonishing Quest for her competitive nature and roughhousing, and swiftly goes after her and Scoots once her deception is revealed.
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