You might want to work on the proportions of the face a little though. To me, it seems maybe the eyes are too high up or the nose and lips are too close.
Also, as lovely as your drawings are, don't forget to neglect studying the body! Judging purely from the second image, it seems that her anatomy is really wacky, and you can make your characters ten times more sexy if you give them a nice body along with their cute face! Do some life studies! :)
Some beuatifully coloured work, the eyes are alittle high up, but it feels like it isn't really noticeable as a 'flaw'. It actually makes it stand out alittle with your style and suits it in my opinion.
Pretty nice, I like them. Though your preferred way of drawing their hair is pretty obvious xD Mostly the same, just different lengths. Anyway, nice work d(^-^)b
They look very nice and realistic. Keep practicing and I'm sure you could be an amazing artist! One suggestion would be to work on the body a bit more :)
Keep up the good work, sweetie~!