So, since the secret of Ayla joining the team is officially out, you should know that she is to be the first to join the Rainbooms. Throughout the series, there will be many warriors who will join the Rainbooms in what will be known as the Guardians of Peace and Harmony. I have before you a list of the members of the Guardians of Peace and Harmony, along with headcanon voice actors for all of them. I do hope you like it. Please note that this will be prone to changes over time depending on a variety of reasons. Please also note that all rights to these characters belong to their respective creators.

Arc 1
Cassandra Morris as Trinity
Rebecca Shoichet as Sunset Shimmer
Tara Strong as Twilight Sparkle
Ashleigh Ball as Applejack and Rainbow Dash
Andrea Libman as Fluttershy and Pinkie Pie
Tabitha St German as Rarity
Cathy Weseluck as Spike
Cliff Edwards as Jiminy Cricket
Rosario Dawson as Ayla
Eric Meyers as Henry the Lizard
Bret Marnell as Crab Tuesday
Seth Green as Leonardo
Rob Paulsen as Donatello
Greg Cipes as Michelangelo
Sean Astin as Raphael
Mae Whitman as April O’Neil
Josh Peck as Casey Jones
Kelly Hu as Karai Hamato
Gwendoline Yeo as Shinigami
David Tennant as Fugitoid
Hoon Lee as Splinter
Matthew Géczy as Serling
Brian Hull as Yakko and Wakko
Eileen Montgomery as Dot

Arc 2
Billy Bletcher as Tom
Sera Berner as Jerry
Kath Soucie as Tuffy
Kevin Miller as Sly Cooper
Alesia Glidewell as Carmelita Fox
Matt Olsen as Bentley
Chris Murphy as Murray
Terry Rose as Guru
Annette Toutonghi as Penelope
Kevin Blackton as Panda King
David Scully as Dimitri Lousteau
Mike McAuliffe as Zig
Ann Christine as Zag
Tru Valentino as Cuphead
Frank Todaro as Mugman
Ashly Burch as Ms. Chalice
Kari Wahlgren as Dorothy and Toto
Kevin Shinick as Scarecrow
John Paul Karliak as Tin Man
Jess Harrell as Cowardly Lion
Jessica DiCicco as Wilhelmina
Steve Blum as Frank
David Errigo Jr. as Lyman

Arc 3
Lacey Chabert as Tinker Bell
Dee Bradley Baker as Blaze
Raven Symone as Iridessa
Angela Bartys as Fawn
Kristin Chenoweth as Rosetta
Lucy Liu as Silvermist
Pamela Adlon as Vidia
Lucy Hale as Periwinkle
Josh Keaton as Terence
Lorenzo Music as Gafield
Desiree Goyette as Arlene
Gregg Berger as Odie and Orson
Thom Hugh as Jon Arbuckle and Roy
Howard Morris as Wade
Julie Payne as Lanolin and Nurse Liz Sheldon
Chris Diamantopoulos as Bo, Booker and Sheldon
Kaley Cuoco as Harley Quinn
Lake Bell as Poison Ivy
Sanaa Lathan as Catwoman
Kelsey Grammer as Clayface
Ron Funches as King Shark
Chris Pratt as Mario
Charlie Day as Luigi
Anya Taylor-Joy as Princess Peach
Erika Henningsen as Princess Daisy
Seth Rogen as Donkey Kong
Kevin Hart as Diddy Kong
Keegan-Michael Key as Toad
Jenny Slate as Toadette
John Cleese as Toadsworth
Jack Black as Bowser
Jeannie Elias as Bowser Jr.
Vin Diesel as Yoshi
Danny DeVito as Wario
Jim Carrey as Waluigi
Sia as Captain Syrup

Arc 3 Part 2
Jason Wilson as Sir Daniel Fortesque
Christine Allado as Princess Kiya
Patricia Summersett as Zelda
Nicolas Cantu as Link
Andi Gibson as Impa
Elizabeth Maxwell as Urbosa and Riju
Sean Chiplock as Revali
Cristina Valenzuela as Tulin
Joe Hernandez as Daruk and Yunobo
Amelia Gotham as Mipha
Jamie Mortellaro as Sidon
Erik Braa as Master Kohga
Gerald C. Rivers as Sooga
Kate Higgins as Purah
Jacob Craner as Robbie
Bill Rogers as King Rhoam Bosphoramus Hyrule
Scott McAfee as Littlefoot
Anndi McAfee as Cera
Judith Barsi as Ducky
Will Ryan as Petrie
Daniel Ross as Spike
Cannon Young as Chomper
Meghan Strange as Ruby
Howie Mandel as Gizmo
Fred Tatasciore as Stripe

Arc 4
Karl Swenson as Merlin
Ben Schwartz as Sonic The Hedgehog
Colleen O'Shaughnessey as Miles 'Tails' Prower The Fox
Amy Birnbaum as Cosmo the Seedrian
Idris Elba as Knuckles The Echidna
Cindy Robinson as Amy Rose
Mike Pollock as Dr. Eggman
Ryan Bartley as Sage
Kirk Thornton as Orbot
Wally Wingert as Cubot
James Arnold Taylor as Ratchet
David Kaye as Clank
Jennifer Hale as as Rivet
Debra Wilson as Kit
Jim Ward as Captain Qwark
Armin Shimerman as Dr. Nefarious
Jordan Scarzfava as Mimi Mimica
Jazzy Oliver as Sorin Battington
Joseph Esposito as Duff B. Mandible
Kelsey Maher as SnowBelle
Sydney Paige as Playto
Kat Alyst as Venus
Steven Reatherford as Hektor Scareborough

Arc 5
Brian Bowles as Asterix
George Weightman as Obelix
Wayne Forester as Getafix
Roger Carel as Dogmatix
Zoe Mills as Avina Gandir
Peter Sallis as Wallace and Gromit
Makiko Ōmoto as Kirby
Eric Stuart as Meta Knight
Maddie Blaustein as Chef Kawasaki
Ted Lewis as King Dedede and Escargoon
Kerry Williams as Tiff
Kayzie Rogers as Tuff
Mike Erwin as Jak
Max Casella as Daxter
Warren Burton as Samos the Sage
Jane Wiedlin as Keira
Chris Cox as Pecker
Phil LaMarr as Sig
Susan Eisenberg as Ashelin
Britton A. Hill as Tess
Chris Kratt as Himself
Martin Kratt as Himself
Athena Karkanis as Aviva
Jonathan Malen as Jimmy Z
Heather Bambrick as Koki
Anthony Daniels as C-3PO
Ben Burtt as R2-D2
Bill Hader as BB-8
J.J. Abrams as D-O

Arc 6
Laura Bailey as Vex'ahlia "Vex" Vessar
Taliesin Jaffe as Percival "Percy" Fredrickstein Von Musel Klossowski de Rolo II
Ashley Johnson as Pike Trickfoot
Liam O'Brien as Vax'ildan "Vax" Vessar
Marisha Ray as Keyleth of the Air Ashari
Sam Riegel as Scanlan Shorthalt
Travis Willingham as Grog Strongjaw
Orion Acaba as Tiberius Stormwind
Matthew Mercer as Trinket
Brenda Song as Shantae the Magic Genie
Anna Akana as Risky Boots
Haley Tju as Rottenstops
Don Messick as Scooby Doo and Scrappy Doo
Frank Welker as Fred Jones
Matthew Lillard as Shaggy Rogers
Grey DeLisle as Daphne Blake
Kate Micucci as Velma Dinkly
Myrna Velasco as Coco Diablo
Squire Fridell as Ronald McDonald
Russi Taylor as Birdie
Howard Morris as Hamburglar
Lennie Weinrib as Grimace
Yuri Lowenthal as Ben Tennyson
Julisa Lopez as Gwendolyn Tennyson
Andrew Russell as Kevin Levin
Bumper Robinson as Rook Blonko
Paul Eiding as Grandpa Max and Zed
Paul Fusco as Gordon Shumway

Arc 7
Robin Williams as Genie
Valery Pappas as Eden
Gilbert Gottfried as Iago
Tom McGrath as Skipper
Chris Miller as Kowalski
Conrad Vernon as Rico
Christopher Knights as Private
Billie Eilish as Sam
Mckenna Grace as Clover
Dana Davis as Alex
Trevor Devall as Agent Hollywood
Melanie Minichino as Agent Fortune and Glory
T. C. Carson as Agent Hardtack
Eliza Schneider as Agent Rama
David B. Mitchell as Agent Red Card
Anna Vocino as Agent Joule
Cherise Boothe as Agent Braddock
Misty Lee as Agent Daisy
Mark Allan Stewart as Agent Yeti
Matthey Yang King as Agent Oni
Arif S. Kinchen as Agent Kingpin
Sharon Muthu as Agent Scheherazade
Matthew McConaughey as Agent Elvis Presley
Dana Gould as Agent Gex
Megan Fox as Agent Xtra

Arc 7 Part 2
Antony Del Rio as Pit and Dark Pit
Ali Hillis as Lady Palutena
Zach Callison as Steven Universe
Grace Rolek as Connie Maheswara
Estelle as Garnet
Michaela Dietz as Amethyst
Deedee Magno Hall as Pearl
Shelby Rabara as Peridot
Uzo Aduba as Bismuth
Jennifer Paz as Lapis Lazuli
Charlyne Yi as Ruby
Erica Luttrell as Sapphire
Kimberly Brooks as Rose Quartz
Susan Egan as Pink Diamond
Ron Perlman as Hellboy
Doug Jones as Abe Sapien
Selma Blair as Liz Sherman
Seth MacFarlane as Johann Krauss
Peri Gilpin as Kate Corrigan
Johnny Yong Bosch as Nate Adams
Joey D'Auria as Whisper
Alicyn Packard as Jibanyan
Melissa Hutchison as Katie Forester
Paul Greenberg as Bear Berstein
Brent Pendergrass as Eddie Archer
Erika Harlacher as Hailey Anne
Katie Leigh as Usapyon
Alex Brightman as Beetlejuice

Arc 8
Brian Murray Bell as Long John Silver
Zehra Fazal as Maria Seadrift
Jaleel White as Zip
Sasheer Zamata as Dazzle
Drake Bell as Ace
Keith Ferguson as Digger
Craig Robinson as Gustus
Lance Reddick as Rings
Nolan North as Yuri
Eric Bauza as Tune
Corey Burton as Shiver
Paul Rudd as Shooter
Christopher Lloyd as Lunar
Patrick Stewart as Commander
Peter Cullen as Optimus Prime
Dylan O'Brien as Bumblebee
Jeffrey Combs as Ratchet
Sumalee Montano as Arcee
Kevin Michael Richardson as Bulkhead
James Horan as Wheeljack
Michael Ironside as Ultra Magnus
Daran Norris as Knock Out
Jeffrey Wright as Uatu the Watcher
Hayley Atwell as Captain Carter

Arc 9
Eden Espinosa as Cassandra Gothel and Fidella
Christy Carlson Romano as Kim Possible
Will Friedle as Ron Stoppable
Nancy Cartwright as Rufus
Tahj Dayton Mowry as Wade
Will Sasso as Jabberjaws
Zac Efron as Biff
Barry Gordon as Clamhead
Kazumi Evans as Shelly
Lizzie Freeman as Bubbles
Mel Blanc as Captain Caveman and Speed Buggy
Chandler Kinney as Dee Dee Sykes
Meg Donnelly as Taffy Dare
Ariel Martin as Brenda Chance
Robbie Daymond as Tinker
Zachary Gordon as Mark
Brianna Gentilella as Debbie
Daws Butler as The Funky Phantom
Billy West as Skip Gilroy
Julie Nathanson as April Stewart
Tom Kenny as Augie Anderson
Jerry Dexter as Elmo
Julie Bennet as Boo
Rove McManus as Dr. Knutt and The Mutt
Bill Newton as Brainfreeze
Kelly Sheridan as Widget
Brian Dobson as Lost Patrol, Headache and Mummy's Boy
Patric Crawly as Mad Madge
Nadeen Lightbody as Amphibia
Hiro Kanagawa as Stress Leave
Brian Drummond as Teddles
Tripod as the Tikis

Arc 10
Haley Joel Osment as Sora
David Gallagher as Riku
Alyson Stoner as Kairi
Jesse McCartney as Ventus
Jason Dohring as Terra
Willa Holland as Aqua
Quinton Flynn as Axel
Bret Iwan as Mickey Mouse
Kaitlyn Robrock as Minnie Mouse
Tony Anselmo Donald Duck
Tress MacNeille as Daisy Duck
Bill Farmer as Goofy and Pluto
JIm Cummings as Pete
Jon Lovitz as Mortimer Mouse
Dove Cameron as Mal
Mitchell Hope as Ben
Sofia Carson as Evie
Sarah Jeffery as Audrey
Booboo Stewart as Jay
Cameron Boyce as Carlos
China Anne McClain as Uma
Keith David as Goliath
Jeff Bennett as Brooklyn
Thom Adcox Hernandez as Lexington
Bill Fagerbakke as Broadway
Ed Asner as Hudson
Adam Harrington as Bronx
Brigitte Bako as Angela
Salli Richardson as Eliza Maza

Arc 11
Sarah Natochenny as Ash Ketchum
Ikue Ōtani as Pikachu
Michele Knotz as Misty
Bill Rogers as Brock
Lindsay Jones as Ruby Rose
Barbara Dunkelman as Yang Xiao Long
Arryn Zech as Blake Belladonna
Kara Eberle as Weiss Schnee
Taylor Kaplan as Molly
Quinn Breslin as Gil
Zoe Glick as Deema
Josiah Gaffney as Goby
Mia Lynn Bangunan as Oona
AJ Kane as Nonny
Leah Janvier as Zooli
Andrew Frankel as Bubble Puppy
Tino Insana as Mr. Grouper

Arc 12
Neil Newbon as Astarion
Jennifer English as Shadowheart
Tim Downie as Gale
Devora Wilde as Lae'zel
Theo Solomon as Wyll
Samantha Beart as Karlach
Jim Henson as Kermit the Frog, Rowlf and Dr. Teeth
Frank Oz as Miss Piggy, Fozzie Bear and Sam the Eagle
Dave Goelz as Gonzo, Dr. Bunsen Honeydew, Zoot and Beauregard
Jerry Nelson as Camilla, Robin the Frog, Floyd Pepper, Pops and Mad Monty
Steve Whitmire as Rizzo and Lips
Richard Hunt as Scooter, Beaker, Janis and Sweetums
Kevin Clash as Clifford, Polly Lobster and Yves St. La Roache
Bill Barretta as Pepe the King Prawn, Johnny Fiama and Clueless Morgan
Brian Henson as Seymore and Sal Minella
Peter Linz as Walter
Matt Vogel as Constantine

Arc 13
Townsend Coleman as the Tick
Micky Dolenz as Arthur
Cam Clarke as Die Fledermaus
Kay Lenz as American Maid
Kyle Hebert as Ryu
Ashly Burch as Chun-Li
Reuben Langdon as Ken Masters
Ray Chase as Guile
Christopher Bevins as Dhalsim
Peter Beckman as Zangief
Allegra Clark as Marisa