Garayann has many story lines. There're separate by the universe, this one is old type. Garayann origin was created by the advance alien race as a bio-weapon. It has abilities to absorb everything and evolve itself to ultimate weapon.
Here's the other one from the Anotherverse's universe ohmega18.deviantart.com/art/TH… this one more focusing on Kaiju concept ,and the war of the giant monster.