I'm Linda, owner of ai-no-senshi.net, and I create animated anime gifs and other graphics. Feel free to use these as you please, as long as you don't repost and claim as your own.
I just realized that episode 121 and 122 has a different version of the transformation, where the butterflies aren’t extremely bright at the beginning. This version was also used in the SMS movie.
Download · 640x480px · 23.32MB
One of the prettiest of her transformations. ;)