This is the giant form of Pucchi, transformed by a certain trigger.

It possesses high combat capabilities, such as firing a powerful blue beam from its horns.

Pucchi's original consciousness remains intact, and it assists Teo to fight alongside him against other kaiju.

Through Ibuki’s hypothesis and repeated instances of gigantification, it becomes clear that the transformation is linked to the strong emotions of the Astronomy Club members when they desire to protect something.