Again, without knowing the exact Lilly Manning story, it's hard to say its significance. But generally, a story can be significant if it teaches a moral lesson, like kindness or perseverance.
One of the best nerdy fiction books is 'The Hitchhiker's Guide to the Galaxy' by Douglas Adams. It's a hilarious and mind - boggling adventure through space. Another great one is 'Ready Player One' by Ernest Cline, which is filled with 80s pop - culture references and a thrilling virtual world quest. And 'Ender's Game' by Orson Scott Card is also a classic, exploring complex themes of war, strategy, and humanity through the eyes of a child prodigy.
Their relationship can start with mutual annoyance. Percy might think Annabeth is too uptight with her nerdy ways, and Annabeth could see Percy as a troublemaker. But as they are paired for a group activity, they start to see each other's positive sides. For example, Percy's punk attitude gives Annabeth the courage to break out of her shell a bit, and Annabeth's intelligence helps Percy make better decisions.
Well, in many 'Astrid and Lilly Save the World' fanfics, they often expand on the unique friendship between Astrid and Lilly. Some fanfics might focus on their adventures that were only hinted at in the show. They can be really creative in coming up with new monsters or challenges for the duo to face.
I'm not sure specifically which 'Lilly Collins ghost story' you mean. There could be many fictional or personal accounts related to her and a ghost story. It might be a story she told in an interview, or a fictional piece she was involved in.