Planet O-50

O-50 (オーフィフティ) is a remote planet, being the homeworld of the elite warriors, Gai Kurenai and Jugglus Juggler.

Ultraman Orb THE ORIGIN SAGA
A mysterious power of light was located at the unexplored mountain peak called Warrior's top (戦士の頂). When Gai and Juggler try to harness it's power, the former was chosen and in turn transformed into the Ultraman he is.