User blog comment:JohnGojira/JohnGojira/PE Proposal: Gigan (Godzilla Franchise)/@comment-30634893-20191120212648

I think I'll give a weak yes. Gigan has never really been as fleshed out as Ghidorah or SpaceGodzilla I feel, and most of his appearances involve him being controlled or manipulated, but he's still one of Godzilla's most sadistic foes regardless, as he's willing to attack Earth and inflict sadistic blows on his opponents with or without mind-control (which, beyond the movies, is seen in supporting materials like Godzilla: Ongoing and Godzilla: Rulers of the Earth). Plus, it has to be mentioned that he's a complete coward when compared to most other kaiju, not only kicking his opponents when they're down but running away with his tail between his legs when he thinks he's possibly outmatched. Even the official Godzilla Compendium calls him out as this. Ouch.

Also, technically, he has reformed and become a hero before: in the Japanese TV series Godzilla Island. But that isn't canon, so I guess it doesn't count.