Rockboy

Rockboy (岩太郎, Iwatarō) is a rock-like animal whose body appears in Mushroom Forest.

Characteristics
Rockboy, as his name implies, has the body of a tall boulder with a chalky color to it. He has a pair of holes for eyes and a gaping mouth. In Kurashima's illustration, Rockboy has a bit of an underbite and his body includes not just a tall, large head, but also a neck section that connects to a much smaller rock body.

Hint
No matter how you see him, Rockboy will prove he has the heart of a rock.

Trivia

 * Rockboy's Japanese name, Iwatarō is a combination of "iwa" (岩), meaning "rock", and "tarō" (太郎), which is a common name and suffix used for males.