Complex sentence: In order to emphasize Ghidorah's heroic role in the movie, the creature's size was greatly reduced, and was portrayed by Akira Ohashi, who moved the creature's heads as hand puppets.
Split into simpler sentences: In order to emphasize Ghidorah's heroic role in the movie, his size was greatly reduced. He was portrayed by Akira Ohashi, who moved the creature's heads as hand puppets.