In general, Ash is often depicted as his adventurous and determined self. He might be shown as being a bit naive at times. Iris, on the other hand, is usually portrayed as strong - willed and feisty. However, it's important to note that spank fanfiction is not a typical or widely - accepted form of fanfiction and may contain elements that are not in line with the original characters' personalities in a more official sense.
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.
The meaning of iris flowers varied according to the color. The meaning of irises could be innocence, wisdom and wisdom, hopeless love, passion and beauty, the messenger of love, strength and eloquence, gold, light and freedom, friendship, bright future, beauty, elegance, mission, an elegant heart, happiness and peace, wealth and longevity, change and miracle, nostalgia and sincere friendship. In general, the meaning of iris flowers was rich and varied, representing all kinds of beautiful emotions and values.
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.