Greg responds...

Well, she did change her clothes occasionally. La Belle Elisa dress that she wore on Halloween and "Eye of the Beholder". The tough girl outfits she put together for "Protection" and "Turf". The clothes she wore briefly in episodes like "Hunter's Moon, Part One" and "Eye of the Storm". The dress she wore in "The Journey". There may be a couple of more examples that I can't think of at the moment.

The short REALITY answer is that redesigning new clothes for her every episode would have been prohibitively expensive and cause multiple animation errors overseas. So we limited her wardrobe changes to situations where story called for it.

Think of her standard outfit as a dramatic conceit.

Within the show, I just think that's a look she's comfortable with. I pretty much where the same outfit everyday myself. Tennis shoes, jeans and a t-shirt. Of course I don't wear the same t-shirt everyday. I have black t-shirts, white t-shirts, red t-shirts. And most of them have some kind of decal or design on them. But...

Anyway, the plan for the comic book is to start giving her a wider variety of costumes. But we still love that red jacket, blue jeans and black t-shirt. So that won't go away.