The following is a general term for Kamen Rider's weirdos from Kuga to Kabuto:
1. Empty me: Gulang Ji.
2. Agito: Unknown.
3. Luigi: Another Kamen Rider, a monster (monster in the mirror).
4.555: Orphnoch (Orphnoch), masked cavalry (mass production in Kamen Rider).
5. Oscar Pistorius: Undead.
6. Hibiki: Demonize raccoons, boys and girls.
7. Kabuto: Worm virus, native virus.
I hope the above answers are helpful to you.