IMO Ella is the worst offender, mainly because she's involved in so many action/high plot scenes that she constantly goes back and forth between extreme high quality beauty goddess to deformed gremlin creature in the same scene.
Made triply worse by the fact that Ella is usually surrounded by new characters who are all drawn way more professionally, compared to emily who at least has solidarity in the rest of the college characters that she's usually with. Watching Ella interact with her "kids" in recent arcs, for example, has led to some serious visual clashing.
