The story is set in the 22nd century where space travel, planet colonization and anti-gravity basketball are practically everyday things. Planet Earth has become uninhabitable, and therefore people live in colonies on the surrounding planets. On a school field trip, a mistake causes the protagonist, a young transfer student named Luna, her pet robot, and six of her classmates to be thrown through a gravity storm and crash land on a seemingly uninhabited planet. There, with Luna as their leader, the robot cat Chako, the lone wolf Kaoru, the spoiled rich boy Howard, the shy Sharla, the obedient Bell, the prideful musician Menori and the young genius Shingo must fight for their survival. But is the planet really uninhabited, or is there someone or something out there, waiting in the shadows?
Porte – Old enough to be the grandfather of the main cast, he is the mechanic of the space transport "Orion". He takes a particular liking to Shingo, as they are both mechanically inclined.
Luna's father - He was the one who found Chako, fixed her, and gave her to Luna. He dies on Mars trying to save Luna.
Louis - Kaoru's rival who got sucked out into space when he and Kaoru had an accident while flying through an asteroid storm.
Farlow - Porte's son who was believed to have died while on board a resettlement ship that crashed on a satellite. Porte however still holds faith that he is still alive somewhere.
Escapees
Brindo - He is an escaped prisoner who highjacked The Orion and crashed to the same island as Luna and the crew. He seems to be the leader and is the most insightful of the three.
Zilba - The only female prisoner of the other two that escaped on The Orion. She seems to enjoy the Island. She has an electric whip and a poison needle gun that she carries around with her.
Bob - Like Brindo and Zilba he is also an escaped prisoner. He is a cyborg and more muscle-headed than the other two.
Native Machines and Animals
Tako - A robot they meet within the mainland. He holds the key to Adam's past.
Survive - An artificial intelligence managing the climate of the entire planet on which the children crash land. Survive is the main antagonist of the series.
Pague - A strange elephantine creature with a long tongue which the group befriends. It appears to be a child of its species. Compared to many of the other creatures on the island that the children crash land on, he is generally more gentle and patient. At times he aids the group with his large size and strength, and the children reward him by feeding him the leaves that he uses for food. The name Pague is used both for the specific creature that the group first encounters, as well as for the species of creatures in general. The name was thought up by character Sharla.
