Gamera vs. Guiron

A curious, brave boy who leads Tom into investigating a sighting and endures escape-and-capture ordeals. He shows resourcefulness by sneaking into the spaceship and guiding efforts to flee when danger escalates. His resilience highlights the movie's theme of courage in the face of overwhelming odds.

Akio's companion and a quick learner who participates in the perilous journey. He demonstrates practical courage and helps drive the escape from the Terran threat. His presence strengthens the bond between the Earth children and their protectors.

Akio's younger sister, who tags along on the expedition and shares in the peril. She contributes to the group's dynamics and shows courage when faced with alien danger. Her involvement underscores the stakes of family and innocence in an alien world.

The gigantic turtle guardian who senses the boys' danger and intervenes in space to retrieve them. He battles Guiron with flame breath and physical prowess, ultimately pinning the knife-headed monster. After the fight, he carries the boys back to Earth, reaffirming his role as Terra's protector.

One of Terra's last inhabitants; a beauty who reveals herself as a cannibal planning to feed on brains for knowledge. She is killed during a confrontation with Florbella, illustrating the harsh rules governing their society.

Barbella's partner, equally dangerous with advanced mind-probing devices. She tries to escape on a rocket but is destroyed by the boys' missiles, dying in the explosion. Her death ends the cannibal threat from Terra's enclave.

A knife-headed monster that serves as Terra's last defense against Space Gyaos. It fights Gamera with ferocity, using its blade-like head and shurikens to inflict wounds. The creature is ultimately defeated when Gamera traps and overpowers it.

A silver, predatory monster that pursues the Terran ship and the boys through an alien city. It clashes with Guiron, contributing to the chaos and danger surrounding the mission. Its defeat marks a turning point in the defense of Terra and the return to Earth.