Jean-Bot

Jean-bot 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 and the humanoid fighting form, Jean-bot. He later joins the Ultimate Force Zero.

Ultraman 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. With many adventures, they eventually fight against Belial and his army. When Emerana uses herself to power Jean-bird after losing power in a fight with Darkgone, Nao helps Jean-bird assume his Jean-bot mode. They manage to destroy Darkgone and help create the Ultimate Aegis to destroy Belial. When Zero is about to leave, Jean-bot, Glenfire, and Mirror Knight intercept him and convince Zero to stay to defeat the remaining Legionoids.

Trivia

 * Jean-bot is based on Tsuburaya Productions earlier creation, Jumborg Ace.