One challenge is the difference in their natures. The wolf is a wild animal, and Red Riding Hood is a human girl. Society may not accept their relationship. Also, their families might oppose it. Red Riding Hood's family would be worried about her safety with the wolf.
In this rather unorthodox 'Red Riding Hood and the Wolf Love Story', their relationship is complex. It might start from the initial encounter which was full of danger in the traditional story, but here it turns into an attraction. Maybe the wolf sees something different in Red Riding Hood than just a prey, and Red Riding Hood might be intrigued by the wild side of the wolf.
The grandmother can be a very interesting character. In some fanfictions, she's not just a helpless old lady. She could be a retired witch who still has some magic up her sleeve. For example, she might have enchanted the red hood to give Red Riding Hood special powers.
Well, the wolf is often depicted as a symbol of danger in the story. It has a strong will to satisfy its appetite, which leads it to go to great lengths to catch Little Red Riding Hood. It is big and menacing, with sharp teeth that are a sign of its ability to be a threat. It also has a sense of stealth, as it manages to get to the grandmother's house before Little Red Riding Hood and hide itself well until the right moment to strike.
These fanfics can also play with the idea of transformation. Maybe the wolf has the ability to transform into a human - like form, and a complex relationship develops between him and Red Riding Hood. It might involve elements of mystery, as Red Riding Hood tries to figure out the true nature of this strange wolf - turned - human.
The real story of Little Red Riding Hood and the Wolf has different interpretations. One version is that it was a cautionary tale about the dangers of the wild. The wolf represents the unpredictable and dangerous elements in nature. Little Red Riding Hood's naivete in wandering alone through the forest made her an easy target.
Well, from my point as the wolf in 'Little Red Riding Hood', I was just out looking for food. When I saw Little Red Riding Hood, she looked so innocent and alone. I thought it was an easy meal opportunity. I didn't mean to be the big bad wolf right away. I just got carried away with my hunger. I first tried to be friendly to get closer to her. But things got out of hand later, and everyone made me out to be this horrible monster.
The wolf deceives Little Red Riding Hood by starting a friendly conversation. He asks her where she is going, and she innocently tells him she is going to her grandmother's. Then he uses this information to get to the grandmother's house first.
In the traditional Red Riding Hood story, it's the big bad wolf. But in the 'little bad wolf and red riding hood story', the wolf is little. Maybe the little bad wolf is not as intimidating as the big one. Also, the plot might be adjusted according to the change of the wolf's size. For example, the little bad wolf may not be able to physically overpower Red Riding Hood as easily as the big bad wolf in the original story.