"I won't tell. Gosh, if only I could do that! It'd be so much quicker to actually make my designs to see how they would fit together and look when someone wears it, rather than just sketches....!"

Marinette can't help but to be impressed. Which is not of course to say that she still isn't impressed with Tikki and her kwami abilities. But this was just a lot more....personal in how the ability fitted in with Marinette's interests and dreams in regards to fashion and all.