Hey Ryona i really like your ranma-esque style that you exemplified in your post. its got that classic anime feel to the features that are definitely spot on. its interesting to see the progression of peoples edits to see how they interpret the style.
i took a little stab at a rendering the face and trying not to deviate too far from the original face/hair structure.

im not sure if your ear sticks out, but i definitely had the same idea as ryona to expose the ear, its just got that stylish haircut feel to it and gives the side of the head a bit more mass to it. Currently because the hair style protrudes so far off of her left side, her right side feels a little unbalanced. adding that ear helps that out a bit.
i dont really know what youve planned to do with the body but i had narrowed the neck a bit, but more importantly really simplified the line work here. its more customary for female anime style faces to have a very smooth, nondescript neck, mostly shadowed over slightly by the head where it meets the base of the chin.
mouth placement wise, i tried givin her a little lip, and lowered and simplified the nose a bit.
the biggest thing i wound up modifying was the palette. i happen to like purplish things :/ and so i experimented pushing the skin tone to be more of a reddish hue rather than an orange. i indicated the palette int he image as well to the right to see where i was going with this. the skintones fade in hue from the peachish skin tone to pinks as it blends to the purple. the hair and eye accents also use that same purple color and the highlights start shifting more to blue. i dont think there was necessarily anything wrong with your palette choices, i was just sort of experimenting.
all in all i still like ryona's edit the most so far, its probably the most on-style for what youre looking to reproduce. as you can see youre really not that far off with your features, just a little extra pixel tech will really make it pop with sexy cleanliness.
umm if i were to spend more time on my rendition there are a few more things id readdress on my rendition, (so far liking ryonas the best) but i suppose different viewpoints never really hurt.