Relationship Overview Edit
When Vanellope first meets Ralph, they start off on the wrong foot as Vanellope steals Ralph's medal earned from Hero's Duty and uses it to get into a race. She promises to return it if he helps her win the race since Sugar Rush racers are returned their medals used to enter the race once they finish it. Ralph is obviously peeved by the request as he wants to continue his game-hopping quest, but he does it anyway for the hardship of the medal. Since Vanellope's original kart the Lickety-Split was destroyed by the other racers, she and Ralph have to start from the beginning, breaking into the kart bakery to build a real kart for her to race with.
Ralph and Vanellope really didn't like each other when they first met. They were both the annoyance to one another as things failed between the two. However, Ralph soon learns that Vanellope is much like him as she yearns to play as a racer in her own game, but lives a hard life because of her glitch.
Realizing that she needs a restart on life like he does, they start over as acquaintances to finish her go-kart dream. Ralph wants his medal and Vanellope wants to win a race, so he agrees to help her with her plan. Ralph finds that he and Vanellope have more in common than he initially thought. He realizes that Vanellope lives in a heap of trash (candy wrappers) like him, that she's disliked by many as he is, and that they both want to accomplish goals that will change others' perspectives of them. They bond over the baking of her kart and teaching her how to ride on an unfinished track where she lives.
When King Candy uses the Konami code to retrieve the medal Ralph is after and returns it to him, he tricks him into agreeing to keep Vanellope from racing. When Vanellope refuses to listen to Ralph, he destroys her kart, leaving her heartbroken and saying, "You really are a bad guy." Then Ralph goes back to his own game with the medal. But when he sees her avatar on the side of the game cabinet, he realizes that she was supposed to be in the game and gets Fix-It Felix, Jr. to fix the kart so Vanellope is able to race.
After Vanellope is restored to her original status as a princess and becomes president instead, she and Ralph go game-jumping together after arcade hours.
Within the fandom, most fans prefer the two to keep their "brother-sister" dynamic, keeping them friends. Other fans, however, like to imagine their relationship blossoming overtime for one reason or another. Because the game avatars do not age, and Vanellope's original form is that of a child, fans like to age Vanellope through an upgrade or continuation to Sugar Rush's franchise, aging her to teenage/young adult years.
Note: Please add only ones that are part of the RotBTD fandom