Comment by khazhoux

> why they depict characters a certain way and not others

The writers have ideas for characters and stories, they share them with each other, they refine them, change them a lot, and eventually try to get to a point where it's a cohesive story.

That's it -- that's the process. And if you ever get to work in an animation studio, you'll see just how much the story changes from the first pitch to the final product.