Quetzalcoatlus Dopant

The Quetzalcoatlus Dopant is the Dopant form assumed when one uses the Quetzalcoatlus Gaia Memory.

There are at least two users of Quetzalcoatlus Memory one of them was a macaw that was used as a test subject thanks to Shinkuro Isaka who made a copy of the Quetzalcoatlus Memory in order to further frighten Nagi Shimamoto by showing a sample of the Memory's powers as the giant Quetzalcoatlus Dopant, the monster Isaka would have her become. The Dopant drags Nagi off until Kamen Rider Double saves her. The copied Dopant is defeated by CycloneJoker Xtreme's Bicker Charge Break.

The second user is the main user named Nagi Shimamoto who's a worker at the Futo Bird Sanctuary who becomes the unwilling subject of Shinkuro Isaka's experimentation with the powers of the Quetzalcoatlus Dopant. After he kills her father, she is made to be the Quetzalcoatlus Memory's user and both her compatibility with the Memory and her fear of Isaka makes it stronger for him to use later.

Kamen Rider Accel Trial later destroys the Quetzalcoatlus Memory before it can be used on Nagi to make it more powerful for Isaka's use.