It could be that Suebee06 is part of a group, and the character who has the slip of the tongue is an outsider trying to fit in. Maybe there are other members of the group who react to this slip in different ways. Some might be sympathetic, while others could be judgmental. The interactions between all these characters would form the core of the story.
There might be a narrator - type character who observes the slips of the tongue involving Suebee06. This narrator could be an omniscient being or just another character within the story's world. And then there could be antagonists who take advantage of the slips of the tongue to create problems for Suebee06 and the other characters.
Obviously, one of the main characters is likely to be Suebee06. And there could be another character who makes the slip of the tongue. This other character could be someone close to Suebee06, like a friend or a love interest.