Gamera: Guardian of the Universe

A colossal turtle-like guardian who rises to defend humanity from the Gyaos threat. Gamera embodies immense power and a mysterious, almost sympathetic, connection to Asagi, whom he saves and indirectly channels through their bond. He battles the Super Gyaos in a high-stakes aerial duel, ultimately sacrificing his recovery time to protect others and retreat to the ocean.

Asagi discovers she shares a spiritual link with Gamera, suffering similar wounds and fatigue as the guardian. Her bond with Gamera drives key plot moments and motivates the team to fight for balance between human and monster. She evolves from a passive observer to a conduit for the guardian's power, ultimately contributing to the climax.

A scientist who translates the runes and amulets that anchor the mystery of Gamera and Gyaos. His intellect guides the investigation and frames the ancient origins theory, though he initially resists the mythic explanations. He collaborates with Yonemori and Nagamine to understand the threat and the potential for human-guardian cooperation.

A Japan Coast Guard officer who witnesses the first Gamera sighting and participates in rescue efforts. He represents human courage and institutional response, coordinating with scientists and officials to confront the emergent threat. His alliance with Nagamine helps bridge field experience and scientific insight.

An ornithologist drawn into the crisis after discovering evidence of a giant bird attack. She becomes a crucial ally, interpreting the birds as a prelude to the larger threat and aiding in capturing the Gyaos. Her perspective links environmental disruption to the awakening of the monsters.