King Joe is a prominent character in the series Ultra Kaijuu Gijinka Keikaku, which transforms classic kaiju monsters into anthropomorphized characters. King Joe, originally a formidable robot from the Ultra Series, is reimagined as a powerful and stoic figure with a strong sense of justice. In the series, King Joe often acts as a protector, using his advanced combat skills and strategic thinking to tackle threats. His character highlights themes of strength and responsibility, making him a crucial ally to protagonists while also dealing with his own internal struggles.