Kas is short for Kasyrra! Here on the forum we call it that, as we call The Observer Tobs, because in both cases, they have complicated names to write and / or remember! (No offense! The names are cool! They just aren't very practical sometimes) !) I often pronounced Kasrra or Kaisrra by mistake!
And as much as this rival thing would probably not work, it gave me an idea!
How about if we meet a NPC Shapeshifter or illusionist who tries to impersonate us to try to steal the credit for our achievements? But unlike the Doppelgänger of CoC1, this would be just a very weak farmer who uses tricks to intimidate others! I remember that they did it on Naruto Shipuden and Lucifer, and it was hilarious!
Imagine the following scene:
You and your party are walking through the forest when you are approached by a strange figure from nowhere, and the strange part is that this figure is one (current species of the PC) (current genre of the PC) just like you, wearing one (current PC armor) and carrying (current PC equipment) the same as yours, even the hair, skin and appendages are the same type and color as yours! In short, it seems that you found a caricature of yourself walking around the Marches, if the exaggerated pose and manner are an indication!
Before you or anyone in your group can ask what the hell jumped in your path, the stranger announces himself in a theatrical way: IF YOU CARE FOR YOUR LIVES, DELIVER EVERYTHING YOU HAVE OF VALUE, BECAUSE YOU ARE BEFORE (PC name) THE (PC title)!
While you try to understand what part of this joke in the form of (current species of the PC) should be you, you hear the members of your party trying (and failing completely) to quietly laugh, before giving up and simply falling to the floor laughing uncontrollably!