Jean-bot ( Janbotto ) Warrior of Steel ( Kōtetsu no Bujin ) is sentient machine that is passed down in Planet Esmeralda's royal family. He has two modes: the space ship mode, Star Corvette Jean-bird ( Sutākorubetto Janbādo ) and his humanoid fighting form. He later joins the Ultimate Force Zero.
After Ultraman Zero took Run as a host and was attacked by Legionoids, he and Nao accidentally stowed in a ship that blasted off into space, revealed to Jean-bird with Princess Emerana on board. After almost wiping their memories, the brothers made friends with the princess and ship and began their journey searching for the Shield of Baradhi to stop Galactic Emperor Kaiser Belial.
