The coloring is very beautifully done, but there's a massive qualm i have with this.
You drew all her proportions as you would a child. Small, short arms. No definition in the waist, and no hips to speak of. Her hands are also extremely tiny and about the size of one of her eyes. The big eyes, the big head, paired with the body makes her seem very child like upon first glance.
Now the addition of the HUGE MASSIVE BOOBS, is very off putting along with the style. Women are curvy, Ahri is very curvy, and also an adult. Making her proportions child size and then giving her an adult woman's chest is bizarre.
Other than that, the coloring is lovely, and the line art is nice and crisp. The proportions though are way wrong for such a character