Edo

In the Ultraman Manga it revealed that the Zettonian race has all but been destroyed during their prior attempt to invade the planet by Ultraman. The last known Zettonian is apparently an individual named Ai-De who now works with the SSSP

History
The self proclaimed last Zettonian, Ai-De first appears to Shinjiro Hayata after his battle with Bemular sitting next to Ide as they looked at the bed ridden boy. Later in a secure room the with Ide present, Ai-De explains his origins, the Alliance and what his father's work entailed. He then asks the boy to take his father's place. It would seem that in present day Ai-De is the head of the SSSP instead of Ide, who seems to act more as his assistant than anything else. Moroboshi is also seen reporting to him about his investigation and requesting his approval to begin and extermination operation. It was during the extermination operation that he requested the Shinjiro defeat the alien. Later when the alien and Shinjiro's fight was heading downtown into a crowded area, Ai-De declared that humans should learn about the existance of aliens on Earth.

Trivia

 * It is ironic that Ai-De would work with the SSSP and Shin Hayata giving their role in his species becoming endangered, but he also serves to show how much the world has changed between the original series and the Manga.
 * One peculiarity about the Zettonian is his name, which while spelled very differently is near identical in pronunciation to Ide's.
 * Ai-De's position as the last of his kind does not conflict with the presence of another Zettonian in Ultra Galaxy Legend as that show is occurs years after the manga it set. The only other Zettonians in the entire Ultra series have either been in other universes or revived as in Ultra Galaxy Legend.
 * Ai-De wears he same style suit worn by the Zetton infiltrator that sabotaged the SSSP base, if he is somehow the same individual it would rather ironic.