What do you think of this character?

The plot sounds interesting, but your main question is about the character and honestly, Khari doesn't sound like a well-developed character. He sounds like a Gary Stu. Why? He's "different" (the whole half-dragon thing) which honestly isn't a bad thing as long as you have a reasonable explanation for it, as long as there are reasonable consequences (predjudice or fear from others, limitations presented by his unique condition, etc). My main problem with Khari though is that he doesn't seem to have any flaws or weaknesses. He's skilled at making things, skilled at swordfighting, and you have portrayed him as being one of those awesome people who are always fun to be around. Characters like this annoy me. Real people aren't perfect, aren't good at everything they do. Real people have flaws. If you want readers to identify with your character more, he needs to have flaws like a real person---flaws that are probably going to make him more relatable. Don't focus so much on making a character who's unique and wonderful and special. Oftentimes, the best characters come from ordinary people put through extraordinary cirstances, people who might not even necessarily be good people or likeable people. Just try to round him out a bit more and he could be a good character. Right now, he just sounds like another Gary Stu to me.