Forest Mecha (森林メカ, Shinrin Meka), also known as The Oldest Robot In The World (世界最古のロボット, Sekai Saiko No Robotto) is an ancient, invaluable, and extremely powerful artifact which functions on the same basis as a powerful and destructive suit of mechanized armor. It is nearly lifelike, being composed completely out of natural raw materials such as wood, water, stone, leaves and more, an extremely old and powerful golem which has defended the earth and its people from numerous gigantic monsters and threats to earth.