Since I don't have first - hand knowledge of this graphic novel, it's hard to say exactly. However, if we think about common themes in graphic novels, it might be a coming - of - age story. Billy and his boots could be symbols of his growth. For example, he might start out as a shy or inexperienced character, and through his experiences with the boots, he becomes more confident and capable. Maybe the boots are a gift from someone important in his life, like a family member or a mentor, and they guide him through various difficulties.
The title indicates that Billy is a main character. And the boots (las botas) are also key. It's possible that there are antagonists in the story too. Maybe there's someone who wants to take the boots from Billy or someone who is causing trouble in the world where Billy and his boots exist. But again, this is all speculation without actually reading the 'billy y las botas graphic novel'.
There was a movie in Las Vegas called God of Gamblers, which was directed by Stephen Chou and starred in Andy Liu, Jacky Zhang, Zhou Yong, and other actors. The movie was released in 1995 and told the story of the God of Gamblers, showing the life and career of the God of Gamblers in Las Vegas. The film was praised by the audience and critics as a classic in the history of Chinese film.
For Nami, her intelligence and cunning are key. She could use her smarts to get Sanji out of trouble in the fanfiction. Also, her love for money and treasure can add an interesting dynamic. For example, she might convince Sanji to go on a dangerous adventure in search of a valuable item, promising him new ingredients for his kitchen.
Perhaps 'y' is a relative of Harry's that was thought to be dead. This relative could have a unique magical heritage that they pass on to Harry, making him even more powerful. For example, if 'y' was a distant cousin from a line of powerful seers, Harry might develop some precognitive abilities.