The Keijo Gamblers are the audiences who are betting on Keijo. In every Keijo race, they are allowed to choose one of the six participants. It is frequently seen that a Keijo Gambler is pissed off at times when the player they have choosen is defeated. Furthermore, they occasionally state that they put their money on the "wrong player".
Since Keijo is a gambling sport, any means of contacting outside is being cut off. As such, they only have a small amount of knowledge about rookies or new players. For instance, Nozomi Kaminashi, who is expected by many gamblers to win on her Debut War, is surprisingly experienced a winless start instead.