First off, I really, really love your series so I may be a little biased here.
What I noticed about your art style is that it utilizes brush strokes in the lineart that remind me of Chinese brush painting or calligraphy. This is actually very suitable, as Keol seems to be set in a Korean kind of country. The backgrounds and lighting are very soft and/or serene most of the time, which somehow contrasts and suits the lineart at the same time. I like how the comic style reminds me of watercolours or ink paintings; loose and almost flowing, but clean.
A couple of things which I noticed are that the character's eyes are quite large, shiny, and round, compared to the rather realistic style and proportions of the characters. Also, you seem to put squared off sections of black where the eyes should be when the character's face isn't in detail. I assume it's a stylistic choice, and it doesn't clash badly, it's just a noticeable contrast, neither overly good or terribly bad in my opinion.
For things you draw very well, I would think they would be backgrounds, weather/lighting, clothing, and shiny magical things (e.g wyrms, outhouse mold, and epic fights.)
That being said, what I love most about your work is the dialogue and emotions. You manage to convey so much in simple actions and a few words. I really like how the characters interact and their beliefs or thoughts. I myself have difficulties with dialogue and I admire how smooth and natural you make yours. Panelling is also well handled, and the different speech bubbles for languages is a great touch.
Speaking of languages, your overall worldbuilding is detailed and includes very creative concepts. Furthermore, the cultural differences between species or races are apparent. Ethan arriving in Keol caused quite a commotion- even though the gate opening was expected.
The only thing I would poke at (and this is nitpicking) is that the names are a tad difficult to remember. Of course, this may just be my poor memory. I remembered Ethan and Danbi's names, but couldn't remember Danbi's niece's name, or the names of her caretakers. However, if you pointed at a character and asked "What did this person do?" I would probably be able to recognize them. You deal very well with character design, and making all of them very distinct.
So yeah, overall, the quality of your comic is superb and I am waiting in excitement for more to come! c: