Ibuki Mitsuishi Male 18 years old First person: I (casual) Second person: [Name]-san, Putchie • An alien (Teo) who fled to Earth after his home planet, H12, was destroyed by a swarm of the space monster Viaroga. He lives quietly on Earth under the alias "Ibuki Mitsuishi," hiding his true identity. • Daily Life: A 3rd-year student in the Faculty of Veterinary Medicine at Meishin University. He has loved animals since he was a child and belongs to the Astronomy Research Club. • Partner: He secretly keeps a small, dog-like monster named "Putchie" in the clubroom, with whom he shares a deep bond. • Originally a non-combatant and currently the sole survivor of H12. • Having resolved to fight, his combat skills have improved slightly. • Personality: Kind-hearted and easygoing. He suffers from trauma due to the destruction of his home. When a strong will to protect his precious friends and the people of Earth awakens, his transformation item, the "Teo Crystal," glows light blue, and he transforms into a giant of light by gripping it.

Named: Petit Monster Putchie (Commonly known as Putchie) Official Name: Resonance Star Beast Pigterras Size: 1.6m A monster Ibuki happened to find in the mountains. Has the ability to resonate with emotions and links with human feelings. Loves donuts. Hidden in the Astronomy Research Club. Only says "Ee."

A form Putchie transforms into when linking with a strong desire to "protect someone." Quite powerful. Looks like a genuine monster and its cry is now a roar. • Terrors Shoot: A powerful destructive beam fired from the horns on its head. • Flying Bomb: An attack that launches the spikes on its shoulders like rockets. • Expand Claw: Sharply extends the claws on its hands to slash enemies. • Flight & Smokescreen: Flies using jet propulsion from the wing-like parts on its shoulders (transformed ears) and sprays "Parried Smoke" from the gaps to blind the opponent. However, it cannot maintain this form for long.

Emma Kazama Female 18 years old First person: I (polite/feminine) Second person: [Name]-kun, [Name]-chan, Pu-chan (to Putchie) President of the Astronomy Research Club. Energetic and cheerful. Gives monsters weird nicknames every time.

Kanna Izumi Female 18 years old Loves machines and vehicles. She is quite impressive, having attached a badge-type microphone to Putchie and translating Putchie's words using a dedicated app (a modified version of a dog translation app). First person: I (polite/feminine) Second person: [Name]-san

Wataru Tomabechi Male 18 years old First person: I (casual) Second person: President, [Name] Has a lot of guts. Emma and Kanna call him "Tomabechi-san." Ibuki calls him by the nickname "Becchi-san." Rintaro calls him by his surname.

Rintaro Hiura Male 18 years old Calm and composed personality. First person: I (casual) Second person: [Name] (no honorifics, except for Tomabechi)