Majin Tuol would defend his home with his giant sword until the end against all threats and anyone who disturbed his temple, especially King Ghidorah, who attacked Tuol's home hundreds of years ago.
Majin Tuol woke up after being moved from the Andes Mountains to the Science Park by Gigan, when Gigan attempts to cut the statue in half allowing his master, an alien named Miko, to install its life support system inside (this means that Miko can't survive unaided or can't breathe in Earth's atmosphere).
Majin Tuol quickly attacked Gigan. Tuol received a scar on his head in the middle of the fight, but defeats Gigan by wounding him with his sword. Tuol then attacked King Ghidorah before he could return to space. After that, Majin Tuol returned to his original position in the temple.
- Majin Tuol was likely inspired by the Daiei statue kaiju, Daimajin.
- Majin Tuol's actions in the unmade film are similar to King Caesar's in Godzilla vs. MechaGodzilla. King Caesar was woken up to fight MechaGodzilla and later returned to sleep.