Hideki Goh

A young race car driver that died when rescuing a little boy and a dog from falling rubble caused by a fight between Takkong and Zazahn. His valiant sacrifice is noted by everyone, even his friends and the new defense force MAT (Monster Attack Team), but an unseen being also takes notice. Looking over him was Ultraman Jack, who is so touched by his heroics that he decides to combining his own life-force with Hideki's, thus bringing him back to life (just like the original Ultraman did with Shin Hayata), much to everyone's astonishment. MAT asks him to join the team, which he does, especially since, in this frightening new "Age of Monsters", the earth will need a saviour.

In times of crisis, Hideki Go will raise his right arm, and by force of will, transforms into Ultraman Jack to fight monsters. In 1986, Ultraman Jack and the Ultra Brothers chase Yapool to Earth, in which they imprison the monster under the ocean near Kobe City. In the process, the Ultra Brothers lost their powers and are forced to live as human beings. Hideki Go, in particular, returns to the car-racing industry and works as a racing instructr. He appears to own a racing academy.

Ultraman Mebius and the Ultra Brothers
20 years later, in 2006, Go and the other Ultra Brothers transform again in order to help Ultraman Mebius. Eventually, the Ultra Brothers regain their powers and returned to normal when Zoffy and Ultraman Taro came to help them.