A spherical war satellite, armed and covered with twelve thousand nuclear missiles, stationed across its entire surface. Its name comes from the effect of its spine-like missiles whose numbers affect its appearance, causing it to resemble a sea urchin.

The Urchin was designed and built by the militaristic Padre, from the planet Castigata, who equipped it with a force field, preventing anyone’s approach to disarm it. With the Urchin representing the jewel in their crown, the Padre gained control over half their world, subjugating it with an iron hand. Since setting their satellite in orbit, with threats to attack the other nations of their world and sights on the other inhabited planets in their galaxy, they continue to gain military control over Castigata.