Kamen Rider Revice S01 E27 Stop It! Tyrant's Rampage and Violent Runaway

"The hero and the demon are a tag team... in other words, the strongest!"

Akaishi reveals Julio, Orteca, and Aguilera are test subjects used by Noah, a group of criminal scientists who seek to use Giff's cells to turn humans into demons, and that he has been using Fenix to transform its soldiers into demons.