1. who is Caolyn
2. why is she looking for a 'looking glass'
3. what is that shadow thing doing?
4. why is it also after the 'looking glass'
The prologue was a little bit uneventful, except for Caolyn looking to get a 'looking glass'. Perhaps you could make it more eventful by spicing up the words, maybe for example something like this.
She was like a leaf on a strong gust of wind. She glanced behind her and saw a Shadow, she had to hurry and find the looking glass before it did.- here's yours
She was like a leaf on a strong gust of wind. She glanced behind her and saw a Shadow, she had to hurry and find the looking glass before it did. As she moved through the crowd she could sense the shadow coming. Closing on her like a predator after the prey.- mine
Only if you wanna. ^_^

, and i'm guessing these are fairies...? Likewise, i enjoy that you stepped up and took up a storyline that has fairies, because people are usualy not attracted to fairy stories.