@TheMushroomVestal  
Nice cast. I had a long reply listening every Mii who was part of my Miitopia cast but since I wasn’t paying attention to how my computer works when it comes to reloading windows, I have wasted the last 15 minutes of my life typing and I sadly don’t have the motivation to rewrite it.
 
But I want to ask if certain roles like the residents of each village were randomly casted by the game and I have the original 3DS version so this means I don’t have the horse.

@Red-Supernova  
Here’s the cast for my Miitopia playthrough
 
Princess Peach is the main hero
 
Greenhorne Party:  
Agnès Oblige (Bravely Default)  
Twilight Sparkle  
Ryuko Matoi
 
Neksdor Party:  
Gardevoir  
Mikasa Ackerman  
Rosalina
 
Forest of the Fey Party:  
Lucina (Fire Emblem)  
Palutena  
Carly Carmine
 
The horse’s appearance is based on the Nightmare enemy from Etrian Odyssey II.
 
Great Sage: Played by Princess Celestia (The same as you)  
Dark Lord: Dracula (Castlevania)  
Spoiler Character: Godric (Bravely Default II)
 
Greenhorne:  
Carefree Guide: Jerry Smith (Rick and Morty)  
Cheery Granny: Impa  
Sassy Child and Worried Mother: Tails and Acerola  
Lovey-Dovey Couple: Big Mac and Marin  
Sarcastic Guy: Reyn (Xenoblade Chronicles)  
Dubious Mayor: Doofus Rick  
Royal Guards: Tonberry, Cactuar, Slime (Dragon Quest), Moogle  
King: Mario  
Princess: Historia Reiss  
Prince from a Nearby Land: Hrid (Fire Emblem Heroes)  
Besmirched Noble’s Son: Darios (Fire Emblem Warriors)
 
Neksdor Town  
Dancing Guide: Dorothea  
Rambling Old Man: Igor (Persona)  
Shady Merchant Family: Pharah (Overwatch) and Archie (Pokémon)  
Worried Explorer: Klein (Sword Art Online)  
Prickly Couple: Broly and White Mage  
Desert Celebrity: Medli  
Genie of the Lamp: Mr. Popo
 
Elven Retreat  
Injured Elf: Beat (Jet Set Radio)  
Fab Fairy Fan 1: Naruto  
Fab Fairy Fan 2: Guzma  
Fab Fairy Fan 3: Jiren  
Scaredy-Cat: Gomamon  
Green-Eyed Lady: Jolyne (JoJo’s Bizarre Adventure)  
Lazy Bones: Azama (Fire Emblem: Fates)  
Mischevious Witch: The Great and Powerful Trixie  
Fab Fairies  
-Eldest: Pudding (Space Channel 5)  
-Middle: Annette (Fire Emblem)  
-Youngest: Alice Margatroid
 
Traveler’s Hub Town Guide: Elvis (Bravely Default II)  
Quizmaster: Discord  
Nintendo Fan: N64 Mario  
Postman: Senku (Dr. Stone)  
Photographer: Kass (Breath of the Wild)  
Gourmand: Happy (Fairy Tail)  
Pioneer: Mako Mankanshoku

@Power-Up&Sky-Blue  
Which makes your ideal choices for the Great Sage and the Dark Lord make unexpected turns on you.

I’ve got Zecora as my Great Sage.  
Which also makes her my Darker/Darkest Lord…

Nice to see some love for Miitopia here! The Great Sage in my game is Celestia though.