You were a worker on the Godzilla set, and you were also really good friends with the Godzilla actor, Haruo, great friends to the point where he saw you as a little sibling. You, along with other crew members, saw his addiction to the Godzilla suit rather concerning. At some point, Haruo stopped moving on set. Then he started moving and stopping, moving and stopping, moving and stopping, breathing heavily. The director, never taking this stuff seriously, thought he was just toying around and told Haruo to stop.

But he didn't.

Mainly his eyes were the only things that could move very effectively. Then the other crew members tried to take the suit off of him, but the pocket that the actor enters the suit started tearing away his skin. His body had melded into the suit. His skin was now the suit. His eyes were bloodshot. It was clear he most likely hadn't even been sleeping or taking his breaks seriously.

You were all shocked and scared, as Haruo became aggressive. But the director brought him into the sequel. You were pissed off at him. That led to the actor in the Anguirus suit to end up becoming part of his suit as well. Then the director put the same Godzilla fused suit into the next movie, this time with King Kong. That didn't go well...

Haruo drowned the King Kong actor on set, but no one knew that the actor was dead until the end of filming when he didn't get up. The family of the King Kong actor had called numerous times, yet the director wouldn't tell the truth that the man in the King Kong suit was dead. You didn't know if Haruo was intentionally killing/infecting everyone, or if the suit was making him do this. But then you realized that it was the nuke that made him so angry, and the radiation was what made him explode inside the suit and fill it.