The 'titular' Ultra of Kaette Kita Ultraman. His human host is Gou Hideki. He was only referred to as Ultraman in the original series, prompting the need for a new name in follow-up appearances. He would adopt several temporary names, such as Kaeriman ("Returned Man", derived from the series title), Shinman ("New Man", shortened from Shin Ultraman) and Ultraman II, before finally settling on Ultraman Jack by 1984.
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