A/N: Some of these are canon characters, others are my OC's (OC = Original Character). Almost all of them have a genderbent version, sort of like a variant- the main characters name will be listed first. 

The Marvel Muses

(OC) Kailee & Kaiden Holtz aka Phoenix... portrayed by Megan Fox and Ian Somerhalder (there is also a version of them that is a villain, they both go by Kai and Dark Phoenix)

Pietro & Petria Maximoff aka Quicksilver... portrayed by Aaron Taylor-Johnson and Alexandra Daddario 

(OC) Cordelia Odinsdottir & Calder Odinson aka Goddess/God of the Ocean... portrayed by Ashley Benson and Chad Michael Murray 

Joaquin & Jovanni Torres aka Falcon... portrayed by Danny Ramirez and Cierra Ramirez

(OC) Camelia & Camille Maximoff aka Sorcircuitry... portrayed by Danielle Rose Russell and Cody Christian 

Peter & Peyton Parker aka Spider-Man/Spider-Woman... portrayed by Tom Holland and Maia Mitchell 

Theodosia Odinsdottir aka Goddess of Thunder... portrayed by Rachel Taylor 

(pre-serum) Steve & Stephanie Rogers... portrayed by Chris Evans and Kathryn Newton

Stephanie Grace Rogers aka Captain America... portrayed by Dove Cameron 

(OC) Kaleb & Kallie Barnes aka The Summer Storm... portrayed by Logan Lerman and Grace Phipps

(OC) Charmeine & Chamberlin Hanlon... portrayed by Zendaya Coleman and Jordan Fisher (Supernatural/MCU crossover)

(OC) Nikolai Novak... portrayed by Daniel Sharman (The Vampire Diaries/MCU crossover)

The Vampire Diaries Muses

(OC) Seraphina & Sebastian Ward... portrayed by Madelaine Petsch and KJ Apa 

Klaus Mikaelson... portrayed by Joseph Morgan 

(OC) Kareena Mikaelson... portrayed by Melissa Benoist

(OC) Erik Mikaelson... portrayed by Joseph Morgan (Klaus, Kareena and Erik are triplets) 

Freya Mikaelson... portrayed by Riley Voelkel

Hope Mikaelson... portrayed by Danielle Rose Russell 

(OC) Theodore & Tatiana Brickenden... portrayed by Timothee Chalamet and Danielle Campbell

(OC) Kaia Halloran... portrayed by Odette Juliette Annable

Malachai & Mckenna Parker... portrayed by Chris Wood and Katherine Langford

Bonnie & Boyd Bennett... portrayed by Kat Graham and Kendrick Sampson 

Katherine Pierce... portrayed by Nina Dobrev 

Marcel Gerard... portrayed by Charles Michael Davis

Josie Saltman... portrayed by Kaylee Bryant 

The Supernatural Muses

(OC) Amelia & Ashton Allen... portrayed by Crystal Reed and Steven R. McQueen 

(OC) Eden & Elias Cruz... portrayed by Phoebe Tonkin and Grant Gustin

(OC) Elijah & Evelyn Cruz... portrayed by Andrew Garfield and Nina Dobrev 

Dean & Dana Winchester... portrayed by Jensen Ackles and Elizabeth Olsen 

(OC) Ezra & Elyza Pierson... portrayed by Hero Fiennes Tiffin and Willa Holland (The Vampire Diaries/Supernatural crossover)

(OC) Alexandria & Alexander Earp... portrayed by Shelley Hennig and Dylan O'Brien 

(OC) Melody & Meldan Hayes... portrayed by Claire Holt and Lucas Till

(OC) Valentina & Valentin Hart... portrayed by Holland Roden and Shaun White

The Teen Wolf Muses

(OC) Aspen Stilinski... portrayed by Hailee Steinfeld 

Stiles Stilinski... portrayed by Dylan O'Brien 

The Containment Muses

Jake & Jaklyn Riley... portrayed by Chris Wood and Katherine Langford 

(OC) Malia & Malik Lancaster... portrayed by Chyler Leigh and Ben Barnes 

The Arrowverse Muses

Mon-El & Moneka aka Mike & Michelle... portrayed by Chris Wood and Katherine Langford 

(OC) Kiera Danvers... portrayed by Camila Mendes 

Misc Muses

Eddie & Edeline Diaz... portrayed by Ryan Guzman and Michelle Rodriguez