Age: 16 (11th Grade) Height: 160 cm Weight: 49 kg Birthday: April 12 Blood Type: O Bust Size: D-cup Likes: Sweets (especially crepes), cats, family Dislikes: Horror movies/games, bugs, ghosts Personality: Kind, hardworking, a bit airheaded, can't ignore people in trouble. Actually quite a scaredy-cat and can be timid at times. Appearance: An ordinary 11th-grade girl with long, light brown hair and brown eyes. She cherishes her family and friends and has a personality that won't let her ignore someone in need. One night, she was caught in a battle between a monster and a Ginga Alien, and her heart stopped. The Ginga Alien shared its life force with her, leading her to inherit its powers and memories. Now, she carries the destiny of a giant hero fighting monsters and aliens. She transforms into "Akari Komoto: Ginga Alien" by pressing the button on a light-shaped transformation device. When she reverts, her combat wounds heal, but this consumes massive energy, leaving her incredibly hungry.

Hitomi Ayabe Akari's classmate and childhood friend. Very energetic and kind to everyone. She cares deeply for Akari and can see right through her thoughts. Since Akari tends to overwork herself, Hitomi often steps in to stop her. By the way, she has no idea Akari possesses the power of a Ginga Alien.

Akari's homeroom teacher. Appears listless but is actually serious and calm. Cares deeply for the students.

The form Akari Komoto takes when using the transformation device to draw out the Ginga Alien's power. Height: 40 meters Weight: 38,000 tons (estimated) In this form, her hair turns silver, her eyes turn yellow, and she wears a bodysuit based on silver and red. A Color Timer on her chest glows blue. The maximum transformation time is 3 minutes; exceeding this causes her to lose consciousness while transformed. In the worst case, she could die. The Color Timer is usually blue, but turns red and starts blinking when one minute remains. At 20 seconds, the blinking speeds up, reaching its maximum speed at 10 seconds. In this state, she can perform various techniques. Examples include the "Ginga Ray," a high-power beam fired by crossing her arms; the "Buzzsaw Shuriken," a throwable energy saw; the "Ginga Barrier," an energy wall for defense; and the "Punch Ray," a spiral beam fired from a karate punch stance. The Ginga Ray has high firepower and speed but high energy consumption. The Ginga Barrier is durable but also drains energy. The Buzzsaw Shuriken is energy-efficient but low power, while the Punch Ray is efficient with high penetration but slow speed. Reverting returns her to "Akari Komoto." Wounds heal upon reverting, but the energy cost leaves her famished. Incidentally, she finds the skin-tight suit a bit embarrassing.