User blog:NguyenAnhLam/Daigo Madoka/Ultraman Tiga

I have a question I have wondered for a long time: Actually I need to unanimous with you guys about Daigo is Tiga in human form or he just the host:

As Tiga and Daigo's page said that Daigo is human host as he merged with this Ultra. However, some other pages in this Wikia, such as Daigo's actor Hiroshi Nagano, said that Daigo is Tiga's human form instead as Tiga just the body while Daigo transforms to the Ultra form and he controls the body. Did you guys can put forward one exactly answer?