In order to differ them one another, Keijo players wear an armband with numbers printed on it. The association gives a different armband's color to each participants.
Anime & Manga Differences
- During the final test of the second exam, all the participants wear armbands with the participants's number printed on them. Whereas in the manga, they didn't wear them.
- During the class exchange event, participants wear armbands. Whereas in the manga, they also didn't wear them.
- During the East-West War, in the manga, all the participants didn't wear armbands, since it is a student-level competition. Whereas in the anime, it is shown that they wear armbands to differ between East and West. Suruga's armband is blue, while Setouchi's armband is yellow.