Kevin Ghidorah

Kevin Ghidorah is the nickname of the left-most head of King Ghidorah, a three-headed dragon and the main antagonist in Godzilla: King of the Monsters. The head, less serious than the other two, was nicknamed "Kevin" by director Michael Doughtery, and has inspired jokes and fan art.

Origin
In Godzilla: King of the Monsters, Godzilla fights King Ghidorah, a three-headed dragon. Each of the heads has a distinct personality, with the left-most head being less serious-seeming than the other two. On June 5th, 2019, director Michael Dougherty repealed on Twitter[1] that during production the other two heads were nicknamed Ichi and Ni (Japanese for One and Two), while the third was nicknamed San, also known as Kevin (shown below).