A Dream's Paradise

Dreams are a subject that many have studied around.
Some believe they are signs from the waking world.
Some believe they are gates to alternate universes.
There are so many theories as to what dreams really are.

But what does Alison believe?

Alison Greene is a young teenage girl of the age seventeen. She still attends highschool, but she's always been on the rocks when it comes to keeping her grades up. This teen has never been fond of social interaction, in fact she's never really spoken a word to anyone at her school unless it was absolutely necessary.
Why does she do this, you may ask?
Well, its because she has no reason to. First of all, crippling social anxiety is a thing. Second of all, she's never needed the waking world, for she's always had the paradise of her own mind.
Alison isn't a normal girl, that much I can say. She can control her dreams to it's fullest extent, spanning from what other people sound like to the geography of her own little world. Everything is completely how she wants it to be!
She has a bodyguard, sworn to protect her when things get tough.
And she has a best friend, one who will console her and comfort her when she is hurt.
Alison's dream world is the ultimate paradise, living as the princess of the kingdom of Gallahide, a province she made all with the sprouting of a single idea.
How is this all possible, you may ask as well?
My answer to you, my friend, is observance.
She has a mind able to take in the most bitter of details and flood them into her memory to the point where they will rest there, patiently waiting for her to fall asleep so such details can be set into her world of dream.
This was the perfect most pleasurable place in all existence for one girl specifically; Allison.
What happens when two people of her perfect world suddenly disappear?
And what happens when they seem to appear to her in the waking world?
You must read further to find out.