Wreck it Ralph

Fix-It Felix, Jr. is the tritagonist in the 2012 Disney animated film Wreck-It Ralph.

Background

Fix-It Felix, Jr. is the hero and the titular character of the arcade game Fix-It Felix, Jr., where he saves an apartment building, and its inhabitants, from being destroyed by a hulking man named Wreck-It Ralph. To everyone in Niceland, the town within the game, Felix is the poster boy for goodness. Felix himself is very polite and kind to everyone he meets, even Ralph. According to Ralph at the beginning of the film, Felix's magic hammer was given to him by his father, Fix-It Felix, Sr. The hammer has the ability to fix anything and everything, and can even heal an injured character 
Personality
Felix is a cheery, lovable, kind-hearted hero. He brings joy to the Nicelanders by fixing their apartment windows whenever Ralph destroys them. As a result, he is often given praises, pies, and has celebrations thrown in his honor. During the celebrations, Felix is shown to be a gregarious person. He doesn't treat Ralph as badly as the Nicelanders do and even seems to be a bit sympathetic for him. When Ralph tires of his role as the villain and abandons his game, Felix is courageous enough to take responsibility and risk his life for his game by searching for him. Felix is good right down to his core. He never swears and has a charm about him that reminds you that he was made to be a hero of the 80's. Felix speaks with a southern accent and is constantly heard using various phrases such as "Oh my land!" and "Jiminy, jaminy!", mostly when something shocking or amazing occurs.
However, while Felix wasn't antagonistic towards Ralph, he was (albeit, unintentionally) insensitive to Ralph's feelings for thirty years, never considering how Ralph felt about his role as the game's villain, simply taking him for granted, and didn't even think to invite Ralph to the game's 30th anniversary, making him find it awkward when Ralph asks to be invited to try some cake.
When Ralph game-jumped, Felix went to get him back, not interested in why Ralph had taken off, only interested in the well-being of his game, and is cross with Ralph once they reunite, expressing how he'd been rejected and treated like a criminal - It was here he finally realized that's what Ralph had been subject to for thirty years, and so they work together to help Vanellope and save Sugar Rush, significantly improving their relationship, where Felix calls Ralph "brother" and even asks Ralph to be his best man at his and Sergeant Calhoun's wedding.