Signing of the Constitution of the Republic of Avalon Ceremony

Crew Members

 * Charles Lightoller
 * Edward John Smith
 * Wallace Hartley
 * William Murdoch

First-Class Passengers

 * Archibald Butt
 * J. Bruce Ismay
 * John Jacob Astor IV
 * Margaret Brown
 * Thomas Andrews

Chefs

 * SpongeBob SquarePants

Guests of Honor (Signatories)

 * Alexander Pepper
 * Arnold Perlstein
 * Babs Seed
 * Baroness Von Bon Bon
 * Blake Belladonna
 * Cuphead
 * Eclair "Jangles" Crème
 * Jaune Arc
 * Joseph Mbadinga (absent due to his death by stress-induced stroke from the First Session of the Constitutional Assembly of the Titanic Colony Riots)
 * Lana Loud
 * Lie Ren
 * Michael Bloomberg
 * Michael Dugan (absent while still in Air Force One)
 * Mugman
 * Nathan Bradford
 * Nguyễn Ðình Tuấn
 * Nora Valkyrie
 * Oscar Hidalgo
 * Park Syngman
 * Pyrrha Nikos
 * Ruby Rose
 * Sci-Twi
 * Starlight Glimmer
 * Su Ji-Hoon (absent due to his mission to help a Vault-Tec representative)
 * Trixie Lulamoon
 * Twilight Sparkle
 * Victor Nevarez
 * Võ Chí Minh
 * Weiss Schnee
 * Yang Xiao Long

Heads of State

 * Princess Celestia (Equestria)
 * Princess Luna (Equestria)

Kids

 * Diamond Tiara
 * Scootaloo
 * Silver Spoon

Parents

 * Bow Hothoof
 * Cloudy Quartz
 * Cookie Crumbles
 * Gentle Breeze
 * Hondo Flanks
 * Igneous Rock Pie
 * Posey Shy
 * Twilight Velvet and Night Light
 * Windy Whistles

Scientists

 * Carli Posada Press
 * Dorothy Ann "D.A." Hudson
 * Jimmy Neutron
 * Jyoti Kaur
 * Ruby Ramirez
 * Ruston "Rusty" Rivets VIII
 * Sandy Cheeks

Siblings

 * Apple Bloom
 * Big McIntosh
 * Limestone Pie
 * Marble Pie
 * Maud Pie
 * Shining Armor
 * Sweetie Belle
 * Zephyr Breeze

UN Peacekeepers

 * Bolortsetseg Ukhnaagiin

Applejack (My Little Pony: Friendship is Magic)
Applejack wears her same exact factory worker outfit from "The Cutie Remark - Part 1."

Equestria Girls (My Little Pony: Equestria Girls)
The human versions of the Mane Six, including Sunset Shimmer, wear the same exact outfits from "I'm On a Yacht," a Better Together short.

Flurry Heart (My Little Pony: Friendship is Magic)
Flurry Heart wears a Dino Attack costume.

Fluttershy (My Little Pony: Friendship is Magic)
Fluttershy wears her same exact shearer outfit from "The Cutie Remark - Part 1."

Pinkie Pie (My Little Pony: Friendship is Magic)
Pinkie wears her same exact Rock Troopers uniform from "The Cutie Remark - Part 1."

Princess Cadance (My Little Pony: Friendship is Magic)
Princess Cadance wears the same dress that she wore during a coronation for Twilight Sparkle in "Magical Mystery Cure" and when she's announcing the next Equestria Games in "Games Ponies Play."

Princess Celestia (My Little Pony: Friendship is Magic)
Princess Celestia wears a Titanic officer's uniform with all her royal accessories kept.

Princess Luna (My Little Pony: Friendship is Magic)
Princess Luna wears a navy blue royal uniform.

Rainbow Dash (My Little Pony: Friendship is Magic)
Rainbow wears her same exact Wondercolts combat uniform from "The Cutie Remark - Part 1."

Rarity (My Little Pony: Friendship is Magic)
Rarity wears her same exact military uniform tailor uniform from "The Cutie Remark - Part 1."

Shining Armor (My Little Pony: Friendship is Magic)
Shining Armor wears his royal uniform during his wedding with Cadance in "A Canterlot Wedding."

Spike (My Little Pony: Friendship is Magic)
Spike wears his exact wedding attendance suit from "The Big Mac Question."

Twilight Sparkle (My Little Pony: Friendship is Magic)
Twilight wears her same exact first coronation dress from "Magical Mystery Cure."

Pre-Speech

 * Imagine
 * Hymn of the United Nations

Post-Speech

 * Glory to Our Avalon
 * Anthem of the Grand Alliance