|This article is about a/an villain in Kamen Rider W.|
- "I've finally found you... My Memory!"
- ―after finding the T2 Metal Gaia Memory[src]
He is a muscular young man who died to protect a piece of land from developers. As a human, he fights with a staff. In addition, he is presented as somewhat stupid and constantly seen flexing his muscles. He is willing to fight Shotaro and Philip as Double without the use of his memory. He is defeated by Shotaro as Kamen Rider Joker with the Rider Punch Maximum Drive in a failed cross counter.
The Fateful Sengoku Movie Battle
A Metal Dopant created by a big tree was part of a monster army led by Nepenthes Inhumanoid appeared to prevent Wizard, Beast, Gaim, Ryugen, Baron, and Zangetsu from stopping Bujin Gaim from acquiring the ultimate power. But he was defeated by OOO Arms's OOO Bash with the Medajalibur along with the Luna Dopant, Hagetaka Yummy, and Sphinx.
Gozo has a rod with a hammer on one end to fights with a staff.
- Main article: Metal Dopant
- ―Transformation announcement[src]
- Height: 200
- Weight: 276
As the Metal Dopant, Gozo can use either of the two weapons, the first one is a double-bladed claw-dagger known as Metal Claw, the other one is a staff with a hammer on one end known as Metal Cane. Aside from these, his regeneration ability from being a NEVER is also enhanced.