Marcus Luttrell is a Navy SEAL. He is the central figure in his own story. He was part of a special operations mission and became the sole survivor of a tragic event during that mission.
I don't know the exact 'Cris Soto Joana fanfic', but generally in fanfics, there can be themes related to the characters' backstories. For Cris and Joana, perhaps there are themes about their families, their past traumas, and how they heal and grow. Also, if they are in a particular setting like a school or a workplace, themes about competition and cooperation might be present.
I haven't come across 'Cris Soto Joana fanfic' myself. But usually, to find fanfics about specific characters, you can also check out relevant fan communities on social media platforms. Sometimes fans share their works or know where to find them. Maybe start by looking for groups dedicated to the source material that these characters might be from.
Marcus Wallace in Pulp Fiction is just one of the many interesting characters. In the movie, each character has their own story arc and significance. Marcus might be involved in the underworld activities or have some connection to the main characters like Vincent and Jules. But to fully understand his role, one needs to closely analyze his scenes and interactions.
It's not a straightforward true story. Meditations is more of Marcus Aurelius' personal reflections and philosophical musings rather than a factual account of events.
His character could develop in a way that he becomes more of an anti - hero. He starts off as a typical Slytherin bully on the Quidditch pitch, but as the fanfiction progresses, he realizes the error of his ways. He might start to fight against the darker elements in the wizarding world, inspired by Harry Potter's heroism. He could still retain some of his Slytherin shrewdness, but use it for good rather than just for Slytherin's glory.