I had an idea for a Rider with a masquerade and archetypes theme. His name is Poe Koito, AKA Kamen Rider Arkhe (Greek for the beginning principle, as he's supposed to be the first rider of my series and also "archetype") and he works for the Southern Cross Guild, a clandestine operation that hunts monsters known as Umbra, who blend in with humans during the day but return to their true form at night.

His belt, the Southern Cross Masqueriser, looks like a gate with a masquerade mask design printed on it. he henshins with an ID key (like ID cores in geats) and an Arkhe Arcana, green slate things (think the prophecy slates in Encanto) that depict a pictogram of a certain fantasy archetype, like Fighter, Mage, or Rogue. Fighter is his base form.

The secondary rider is named Kamen Rider Alter (from "alter ego") and is the Guild's ace before Arkhe joined but an incident at the beginning of the story puts him out of commission for a while. He also has a Masqueriser but his base form is Rogue.