King Ghidorah is seen as one of the most antagonistic kaijus in the Godzilla franchise.
The body is run by Ichi; an intelligent and relatively sadistic personality with the body's ideals in mind.
The head to the right of Ichi is Ni; a headstrong fighter who prefers to engage in combat, and is highly aware of their surroundings.
The head to the left of Ichi is San; The dumbest, but most curious of the group. He acts the least like the rest, and is significantly less apt to fight.