This is a collection of designs made by the late Goro Murata (村田護郎), designer that worked on the Magic Knight Rayearth project. The origin of these images is the blog made to archive and document his works:
https://gorobo3.jp/category/home/layearth/

The author put those watermarks due to the risk of the copyright holders complains about the usage of the images. This is only an archive, for the explanations of the designs, it is better to check the website itself.