Sorry, I wasn't able to review based on your whole comic, it looks like a good read and I have bookmarked it to read again later when I have more time. This review is based on the prologue and most of chapter four.
Storytelling:
I was actually quite surprised, I was able to get a general idea of the story and enjoyed reading it, even though I didn't know the characters.
I actually laughed when they found the dragon in that granny's basement. Definitely not a cat lol.
I can actually feel the plot thickening, even though I have no idea what is going on and I do NOT trust that guy with the glasses. He is UP TO SOMETHING.
There are a few grammar errors in the dialogue, they can sometimes be a bit distracting for the reader (e.g. past and present tense mix-ups and incomplete sentences) If you just put your dialogue through some sort of word processing program like Microsoft Word it should pick up on errors like these for you.
The fact that I can still enjoy your story and grow attached to your characters by only reading the first and last bits shows that you have quite a talent for storytelling. Keep up the great work!
Art:
Your art is looking fantastic, I can see a definite improvement from the first few pages!
Your pages are lovely and detailed and I like your use of large black areas. It's obvious how much time and effort you put into your pages and it really shows. 
Something seems wrong with Kestrel's design, up close her face doesn't look natural, but you don't seem to have this problem with any other characters. I think maybe her forehead is too small? Her hair is quite thin so that could be why she's the only character with this issue. Just a guess, I could be wrong.
Your character designs are really nice and distinctive so I can easily tell characters apart.
Your art style is nice and neat and I can always tell what is going on.
Your Webcomic as a Whole:
Awesome reader-creator interactions and your comic is a joy to read! I forgot what I usually put here
42 points! And a complete volume of the Hitch-hikers Guide to the Galaxy! (points are irrelevant and completely unrelated to each other but I thought I'd put them here anyway)