Patricia "Patti" Mayonnaise is the secret love interest of Doug Funnie and a recurring character in the series.
Despite these events she continues to hold a positive attitude on life and does her best to enjoy life with her friends and family.
Not only is she an ace student, she's also an accomplished athlete and a pro at the beet-centric sport Beetball. However, she isn't perfect, as she is also rude at times when she's hungry and is prone to lose her cool if pushed too far. She also has a very strong competitive streak, especially when it comes to sports. Nevertheless, she is generally a kind and supportive friend and is not afraid to step in if one of her friends is being bullied.
Relationship with Doug
The first time her affections were explicitly shown was in "Doug to the Rescue" from the first season, after Doug psyched Roger for getting her Detention. In "Doug's Magic Act" from the Third Season after getting Handcuffed to one another, Patti tells Doug she isn't going to talk to him after they missed getting to the Magic Shop in time before it closed to get the Handcuffs taken off, Patti tells Doug she isn't going to talk to him again.. She also tells him he is very selfish. But Doug then opens up to her and says “You’re all I ever think about, Patti. That’s why I bought this trick. To show you. That’s why I saved up seven allowances. If I had any idea it was gonna turn out like this, I wouldn’t’ve even tried it. I guess I only wanted you to…you know, like me or something. And now well, I feel so completely stupid, I almost wish I never moved here in the first place.” Patti then tells Doug that she was sorry for getting aggravated and tells him that he is her favorite person to be around and they hold hands.
In the episode "Doug & Patti Sittin' in a Tree," Patti asks Doug out to the movies and afterwards, the two consider the idea that it was a date, but try to laugh it off. They almost kissed, but Patti sort of felt scared as she seems to have feelings for Doug.
However in an episode of Nickelodeon's Doug called "Doug Throws a Party", when Doug refuses to take off Connie's hat because he doesn't want to embarrass her, Patti says "That's the most grown up thing anybody's done tonight. That was very sweet of you" and she kisses Doug on the cheek.
While that was how far it got in the Nickelodeon series of Doug, in The Disney series of Doug they added another character, Guy Graham, who had a crush on Patti as well, but in the final episode of Disney's Doug, Patti asked Doug on a date-date. Thus as one would assume ending them both together. Jim Jinkins, however, mentioned in 2016 that he had developed a sequel storyline featuring Doug and Patti as college-aged young adults and hinted that the two would remain a couple.
- "We're having your favorite. Liver and onions!"
- "The Second Article of the Constitution states the courts shall have the power to punish anyone who covers the science lab in molten lava."
- "Don't say that, Doug."
- While Patti is great at sports, she can’t cook.
- She has a guinea pig named Hamlet.
- Patti has a croaky Southern drawl because Constance Shulman, her voice actress, is a Tennessee native.
- Patti's mother died a long time ago, making Doug one of the 4 Nickelodeon shows where a major character's mother has been explicitly confirmed to have passed away. The other three are Otto and Reggie from Rocket Power, Katara and Sokka from Avatar: The Last Airbender and Chuckie from Rugrats.
- Patti used to have a darker complexion, but this was later changed to a more light complexion.
- Patti is actually considered to be one of the very kindest characters on the show.