Collective
These are characters we relate to as a collective, rather than as individuals. We tend to interpret them as plural.
Monster Zero (Godzilla franchise; canon varies)
Kaguya Shinomiya (Kaguya-sama)
Amity Blight (The Owl House)
The Shifting Mound (Slay the Princess)
Shirley
Adora (She-ra and the Princesses of Power)
Patricia Watson: Skullgirls
Peridot (Cucumber Quest)
Mackenzie (Touch Detective)
Lina Inverse (Slayers)
The Razor (Slay the Princess)
Agnès
Agnès Oblige (Bravely Default)
Neil Moynihan (Magical Girl Neil)
Asa Mitaka (Chainsaw Man)
Dot (Pokémon Horizons)
Antigone Funn (Wooden Overcoats)
Toothless (How to Train Your Dragon novels)
Jill Stingray (Va-11 HALL-A)
Eva Tsunaka (Project Eden's Garden)
Space Dread (Val & Isaac)
Tomo Ebizuka (Girls Band Cry
Fiorella "Fiore" Ricci (Disventure Camp)
The Prisoner (Slay the Princess)
Wolf
Wolf O'Donnell (Star Fox)
Sasha Waybright (Amphibia)
Ariella Magicorn (Space Battle Lunchtime)
Simon Laurent (Infinity Train)
War Devil (Chainsaw Man)
Greed (Fullmetal Alchemist)
The Adversary (Slay the Princess)
Amariss
Monika (Doki Doki Literature Club
She-Ra (She-Ra and the Princesses of Power
Mewtwo (yes, the Pokémon)
Ameri Azazel (Iruma-kun)
The Spectre (Slay the Princess)