The El Dorado Five consist of four aging but boisterous Armor pilots, Nero, Josè, Carlos, and Barrio. They spend their days reminiscing about past battles, which annoys the rest of their town to no end (because they believe they are making it all up for attention), fueled by their great liking for alcohol. The fifth member, Chizuru, has already died. Each of their animal-themed Armors can unite into a one gigantic mecha (Legs, Torso, Head and Shoulders, Arms, Backpack) called El Dorado Five, which possess great strength and power. The inn they frequently visit is managed by Yukiko, Chizuru's granddaughter.