Yotsuyu is revealed to be a Rock Human with a stolen name, belonging to a Locacaca Organization.. Yotsuyu is a Stand user who wields the Stand I Am a Rock
Yagiyama is a Rock Human of slim build and average to above-average height. He has shoulder-length, straight black hair with short bangs. His eyes are black with small triangular highlights. He wears a headpiece of leaves and a collar with a pin bearing the letter H. His arms, stomach, and legs are clad in a dark, leathery material studded with small metallic spikes. Over this, he wears a crop top and a pair of floral-printed bloomers. Attached to his belt is a small pouch.
