when i first saw Last Chance i couldn't help but think: there's an image where the artist's intention was good, but the result not really that close.

to begin with, the two characters are in a good position, Kyed actually looks like he's pulling Ria closer to him and their expressions are believable (him, trying to be fierce and protective, while she is scared and insecure). the folds and the shading on the characters' faces are also pretty accurate, and i really like the way you did Ria's hair. very nice technique used for drawing her hands as well, you understood the fact that they have a sort of transparency about them, and that shows in the way her fingers look when opposed to the bright light of the stone around her neck.

what i really disapprove of is not using a reference image. i guess it would have been difficult to find one with two characters staying in that position, but i'm sure there are plenty of photos of guys holding swords just like Kyed is. that helps a lot in understanding how human anatomy works and it will give your drawing that realistic look you have been trying to achieve
also, concerning realism, there's one important thing you must always keep in mind when coloring: warm colors have cold shadows, while cold colors have warm shadows. highlights and shadows use complementary colors. for example, instead of those darker shades of pink and brown you used for Ria's face (for example), you could have used some blues or purples mixed into that.

i know it sounds complicated and i'm not suggesting a complete make-over. instead, try to keep these tips in mind and follow them, they will improve your later drawings