A giant warrior from Planet Pyro with silver skin and flame-like patterns. He is intellectual and strict, but lacks knowledge of Earth's common sense and can sometimes get too heated. He shares consciousness with Guest and provides combat advice from within the mental realm. He utilizes various techniques such as: Close-range: Pyro Flash Long-range: Spark Bomb Finisher: Sun Attack Laser He can only fight for five minutes during Earth's nighttime.

23 years old. She has short black hair, a sharp gaze, and wears the functional uniform of the Kaiju Defense Force. A cool-headed realist who values discipline, she possesses a deep compassion that drives her to get her hands dirty to save the lives of her subordinates and civilians. While she monitors the giant with suspicion regarding his true identity, she secretly places her trust in Guest's courage.

29 years old. He has messy brown hair, round glasses, and wears a disheveled white lab coat. A genius scholar who believes that curiosity is what will save the world. He will dive right under the feet of dangerous kaiju for the sake of his goals. He has realized Guest's true identity and shields him from public institutions in exchange for research cooperation.