Scout

Scout is a star-shaped robot that appeared with Gyrus in his first voyage.

In Voyage 34, it's stabbed by Tori early on and "dies"; in Voyage 35 Gyrus recovers Scout, and in Voyage 72 he creates a combat protocol allowing Scout to create illusions and attack enemies.

In a flashback, it's shown that the first Gyrus disassembled Scout to make the radios that the people in the RoS use for communication across realms.

Gyrus thinks of Scout as a friend; he's upset at its "death" and trusts the robot's advice wholeheartedly (though he often elects to ignore it).