Ultraseven (ウルトラセブン, Urutora Sebun?) is the title character of his series. He is 17,000 or 19,000 Earth years old. He is very mostly famous showa heroes because his series, is played on TV during the death of Eiji Tsuburaya. He is the nephew of the Mother of Ultra and Father of Ultra, the first cousin of Ultraman Taro, and by adoption Ultraman Ace. Ultra Seven is played by Kohji Moritsugu while Dan Moroboshi is also played by Kohji Moritsugu.
A soldier from the Land of Light in the Nebula M78 , 340 was originally sent to map the Milky Way, he visits a planet that captivates him, our very own Earth, and on his first visit, saves the life of a young mountain climber named Jiro Satsuma, who nearly fell to his death to save a fellow climber from sharing his fate. Instead of combining with him, like Ultraman did to Science Patrol member Hayata, 340 makes himself into an exact likeness of the unconscious Jiro (with more casual civvies), but renames
himself "Dan Moroboshi" to avoid confusion. A mysterious but friendly and helpful young man, Dan joins the Ultra Guard as its sixth member, but unbeknownst to them (and anyone else for that matter), he saves the day from alien invasions in his true guise as Agent 340, christened by the Garrison as its "honorary 7th member," Ultra Seven.Some people who did not watch the series say he could not save the world from evil and now haunts him.
His memory of not saving the world from evil still haunts him. After so long, a new ultraseven in the seven family comes and tries to help out his brother by saving the world ultraseven couldn't. In Ultraseven X, Seven loses his memories and assumes the identity of 25 year old DEUS agent, Jin and with the Ultra Eye presented to him by Elea, Ultraseven X until the last episode where he reclaims his memories.