Some things I noticed while reading:
First thing I notice is that the beginning starts out with a lot of telling details which isn't the best way to drawl in your audience. A lot of this detail is good, but if this is meant to be a novel, it should be shown over the course of a few scenes, rather than given to us all at once. Ex: Give me a scene that shows Chantelle acting the tom boy and her parents distress over it. A scene like that could be a lot of fun and hook your audience better.
Next, the dialogue. I love dialogue and yours seems good, but if you are going to tell me something in the dialogue, like that Chantelle wonders about the neighboring kingdom, do not waste both of our time by doing it in the narration.
Same with the introduction of Casey. Just by the story she tells with some very good dialogue, I can tell she is a trouble maker without any background information, so cut the narration down.
With Isla-May, you say it is a long and tedious meeting, but all we get is too quotes. Make it a long tedious meeting by adding more dialogue and interaction between characters. This way, you can give us a lot of info about the state of your world w/o it looking like an info dump.
Again with Laleh and Isla-May. Don't tell us what their relationship is. Show us though their dialogue and actions in the scene.
And a cliff hanger. Very good.
My over all impression:
Good characters, good world, good dialogue. Just try to cut down on the 'tellness' of your narration and show us all these good things through scenes with concrete details, action and dialogue. Tighten up your sentence structure and vary your word choice (except with dialogue tags like 'said' that you should use all the time). A lot of your sentences used 'was' as a verb, and that tends to make the writing weaker. Oh, and cut down the qualifiers. Words like 'seemed' and 'appeared to' or nothing phrases like 'needless to say' or 'after noticing this' fluff up your writing needlessly.
Ex:
“It’s too nice a day to sit inside, so we thought we’d take a wander around the fields,” he explained truthfully; yet worry was evident, marring the truth that was evident in his eyes.
vs
“It’s too nice a day to sit inside, so we thought we’d take a wander around the fields,” he said; though worry marred the truth shining through his eyes.
Good Luck and let me know if you have any questions.