Japan is gearing up for the 2020 Olympics, and the entire country is getting excited. A group of anime artists have launched an un-official project to welcome to world to Tokyo, by illustrating the participating nations as anime characters! The project, called World Flags, wraps those flags around an anime character from each country, although it is an ongoing project, and not every nation is represented yet.
These are very anime, as all the characters are young, athletic, and attractive (as are Olympic athletes), and the clothing style is medieval Japanese while incorporating features from each country.
The World Flags gallery is in Japanese, but your knowledge of world flags should help you identify characters who aren't labeled in your language. You may need to copy and paste a character's description to Google Translate for more information. You can see thirty of the characters in a list at Bored Panda.