A protagonist is a term used to refer to a figure or figures in literature whose intentions are the primary focus of a story. Classically protagonists are derived from good will, however, this does not always have to be true. Protagonists cannot exist in a story without opposition from a figure or figures called antagonist(s). Classically in literature, characters with good will are unusually the protagonists, however, not all characters who assist the protagonist are required to be simple protagonistic.

The main character is often faced with a "foil", a character known as the antagonist who most often represents obstacles that the protagonist must overcome. As with protagonists, there may be more than one antagonist in a story.

In a SexSkit, there is always one protagonist and only one antagonist. The obstacle poised by the antagonist to the protagonist is usually a decision to accept the terms of the seduction as dictated by the rules of the genre and sub-genre, and progress into sexual activity with the antagonist. This creates the conflict in the SexSkit, and while internal, it helps to create the atmosphere and generate sexual tension between the participants.

In the majority of the SexSkits, the protagonist will be the male participant, and the female participant will assume the role of the antagonist. There are times where the protagonist may switch roles with the antagonist, such is the case in sexSkits that are written around the "Turnabout" genre.

The "foil", or conflict usually takes the form of perceived infidelity or some other moral issue, where the protagonist must choose to remain moral and the SexSkit ends, or succomb to temptation, and the SexSkit progresses to an eventual sexual union and climax.