Each girl was created at a different time and independently of each other, with time and love invested in their creation. These are not just "stock" models. The only thing they can be similar in is the hairstyle.
sorry i'm not trying to be rude and ya seeing them side by side like that i can see the different facial features but you got to admit that they almost look like they could be sister and one of the images in the side even has her in an outfit i think that the other character wears or is at least very similar. honestly when i first saw her imagine i didn't really see it until i saw her with that sweater and shorts.