Great Girros greatly resembles a cobra in appearance though walks on all fours like a monitor. It is covered in black onyx scales and has yellow stripes running down the back of its neck. On the side of its neck is a hood with red gill-like organs.
Great Girros has large fangs filled with a paralyzing venom. It just takes a single bite from these fangs to paralyze prey as big as Radobaan. It can also spit a yellow fluid from its mouth that can paralyze prey.
Great Girros can be seen prowling around the Rotten Vale.
Great Girros is an active scavenger that is constantly looking for new corpses to feed on.