Gidrah

The Gidrah is a three-headed monster from Final Fantasy Mystic Quest. It resides at the top of the Giant Tree in the Alive Forest and rules over the monsters infecting the tree. It enters battle with two Skuldiers and uses After Benjamin and Kaeli defeat it, the tree carries them across the forest, allowing them to proceed to Windia.

Etymology
The creature's tri-headed nature and it's name are both references to King Ghidorah, a three-headed dragon from the popular Godzilla film series.