I actually didn’t know about about Luna Cats (ルナ, Runa), but when I had covid in 2021, I drew a lot of drawing including these of Luna Cats. Apparently they are her companions are the Sailor Guardians, but I don’t know much about that. As I understand Luna can talk and serves as a sort of advisor. I guess I need to watch the show! I should mention it is Japanese. The drawing on the right was drawn with colored pens, and the drawing on the right was drawn with colored pencils, both using a pad of paper about 8.5 by 5.5 inches. My art is simple and just takes maybe 30 minutes per drawing max. That said, some drawing I started, and didn’t like, so I started over, so I guess the average (finished) drawing time is more than 30 minutes. During that time I also made some Harry Potter drawings.
