A former soldier who lives in isolation after getting gravely injured on a battlefield.
Currently working as a member of the [Roaming Hawks], he meets Rose for the first time when the leader, Alba, presents Gatto with the universal A.I. "Rose".
Rose's friendly approach to Gatto gradually opens his heart, but Rose's function is lost due to the spaceship's emergency landing.
Thus, he battles enemies on planet Ureun in order to find a way to repair Rose.

The aerospace A.I. installed on a spaceship controlled by Gatto. She has a lively personality and likes to play around.
She was originally was a product found to be faulty by its manufacturing company due to not meeting the standard computing power.
It was later purchased by Alba for a cheap price on the space market and sent to Gatto.
Gatto's unfriendly demeanor initially disappointed her, but she soon begins to approach with caution and becomes close friends after discovering a deep wound in his heart.

By instilling terrorism, she aids the exploited [Elbbaks], the creatures of Ureun, all across this planet.
She meets Gatto after stealing parts from Gatto's crashed spaceship.
She offers to help fix Rose, but only if Gatto assists her in rescuing the Elbbaks first.

The Elbbaks are crustaceans with a weak body who are extremely curious and friendly to humans.
They are the planet Ureun's most populous race.
They are being exploited and forced to work for humans.