Page "Ultraman" Paragraph 60

Ultraman is one of the few Ultra-Crusaders who remains connected with his human host ; despite being separated by Zoffy in Episode 39.

Ultraman would return to recombine with Hayata after Ultraman finished healing from the wound he received from Zetton.

in this case, Shin Hayata still serves as a vessel for the mighty alien warrior, as first revealed in Episode 38 of the Return of Ultraman series, in Episode 34 of Ultraman Taro, and Episode 47 of the Ultraman Mebius series and movies.

Note: Ultra Seven, Ultraman Leo, Ultraman 80 and Ultraman Mebius used their powers to create human forms for their use and did not share their existences with any human host.