Tidus

Star player of the blitzball team, the Zanarkand Abes. He is pulled into the world of Spira and joins magical ponies and a summoner to fight against the monster Sin.

Yuna

Having recently become a summoner, Yuna embarks on a journey to obtain the Final Aeon and bring about the next Calm as her father had done ten years ago.

Whoa. o.o I was expecting Tactics, but not G5. Quite the revelation. What's also interesting is that Tactics has characters from other Final Fantasys making an appearance. Maybe Sunny and her friends could get some stories on previous adventures with the Elements relayed from Cloud and Balthier, providing they didn't meet them beforehand.

Rikku

One of the first people Tidus meets upon entering Spira. She is an Al Bhed, a race that for many years had been ostracized by the Spiran population.

Wakka

Captain of the Besaid Aurochs, a team that had never won a single professional blitzball game. After the next tournament, he intends to be a full-time guardian of Yuna.

Lulu

A black mage who serves as one of Yuna's guardians. In the past, she was the significant other of Wakka's late younger brother.

Kimahri Ronso

Another guardian of Yuna. He has protected her since she was a child. Unlike his fellow Ronsos, his horn is broken.

Auron

A man who has known Tidus since he first came to Zanarkand. It turns out that he was friends with Tidus' father Jecht and Yuna's father Braska.

7777862
Small typo with this one. Also what happened to the pics?

Seymour Guado

A newly appointed Maester of Yevon, the religion that influences all of Spira. He is a born from a human woman and a male Guado.

7777864
I'll work on them.

Shantotto

A Tarutaru hailing from the Federation of Windurst, Shantotto is a black mage known for her distinct laughter and speaking in rhyme.

The Shadow Lord

The Shadow Lord instigated the Crystal War to destroy the Enlightened Races of Vana'diel.

Starswirl the Bearded

One of the Pillars of Old Equestria, Starswirl exiled the Dazzlings centuries ago. He is one of Twilight Sparkle's idols as well as a mentor to Celestia and Luna.

I do admit a refresher for the MMO helps given those are the few numbered installments I haven't played in detail.

7778172
Yeah. Not to mention: since FF11 and 14 are both MMO's, that means there's no real protagonist; they're pretty much the players' avatars.

7778223
Ah. So the Equestria cast a very well end up taking up that role themselves.

7778225
It's possible.

Mage Meadowbrook

Long ago, she was once a healer known as the "Mystical Mask." Her knowledge of medicine has proven quite useful.

Flash Magnus

A pegasus pony who was a cadet of the Royal Legion of Cloudsdale.

Mistmane

Her purpose in life is spreading beauty and kindness across Equestria.

Rockhoof

Another Pillar of Old Equestria, Rockhoof started out as a scrawny earth pony until he saved his village from an erupting volcano.

Somnambula

A pegasus who challenged a sphinx that stole her village's crops.

Stygian

The unicorn who brought together the Pillars of Old Equestria to do battle with the Sirens. However, he had become jealous of Pillars' glory, and that jealousy had transformed him into the Pony of Shadows.

Sunburst

Starlight Glimmer's foalhood friend. His earning a cutie mark was once the catalyst of Starlight's turning evil, although they later met again and rekindled their friendship. May or may not be related to Sunset Shimmer.

Vaan

An orphan and street urchin living in Rabanastre. He lost his brother Reks two years ago.

Penelo

Vaan's childhood friend who learned martial arts from her older brothers. She often tries to get Vaan out of trouble with little success.

Balthier

A sky pirate calling himself "the leading man." Charming, cunning and cynical, Balthier finds himself in conflict with the Empire of Archadia.

Fran

Balthier's partner in crime, Fran is a veria: a humanoid creature with dark skin, thick, white hair, rabbit-like ears and long claw-like fingernails. Her title: "Master of Weapons."

Ashe

Full name: Ashelia B'nargin Dalmasca

Once the Princess of Dalmasca, Ashe seeks to overthrow the Archadian Empire and reclaim her kingdom.

Basch fon Ronsenburg

Disgraced former captain of Dalmasca's knighthood. Publicly, it was announced that he has been sentenced to death for the murder of King Raminas.

Vayne Carudas Solidor

The elder son of Emperor Gramis, Vayne is appointed imperial consul of Dalmasca, its de facto ruler. A brilliant tactician and speaker, he proves himself to be a dangerous adversary.

Lightning

Real name: Claire Farron

A woman who, in the midst of saving her sister Serah, becomes entangled in a conspiracy against her home world of Cocoon.

Snow Villiers

Snow is Serah Farron's fiancé, despite Lightning's disapproval. He often talks and acts before thinking, unintentionally causing trouble.

Yeah something I just got to thinking with FF13. I I am especially interested how characters from a world where "friendship is magic" will end up playing off a main party that honestly starts out pretty dysfunctional compared to most FFs.

Oerba Dia Vanille

Hailing from the village of Oerba, Vanille joins our heroes to save Cocoon. Sunny, warm, and energetic, she bears the eidolon Hecatoncheir.

Hope Estheim

Despite his first name, he is doubtful and negative about certain things. He blames Snow Villiers for the loss of his mother Nora.

Galenth Dysley

As the leader of the Sanctum, Dysley instigates the Purge to wipe out those he claims to be tainted by the world of Gran Pulse. His true motives, however, are a mystery...

Minfilia Warde

The head of the Scions of the Seventh Dawn. Her charisma has earned her respect amongst her peers.

Gaius van Baelsar

Also known as: The Black Wolf

A survivor of the Seventh Umbral Era, Gaius was an Imperial Legatus of the Garlean Empire. Now on his own, he seeks to rule Eorza for himself.

Noctis Lucis Caelum

Despite his being the crown prince of the Lucis, Noctis treats his friends as equals. While on his way to marry his childhood friend, he learns of an attack on his home city by the Empire of Niflheim.

Lady Lunafreya

Princess of Tenebrae and Noctis' fiancée. Her home was also invaded by Niflheim.

Ardyn Izunia

The Imperial Chancellor of Niflheim. Underneath his flamboyant demeanor lies a manipulative, ruthless being.

Looks like we're about up to speed on these for the time being.

Cutie Mark Crusaders

Three fillies who until a certain event involving Diamond Tiara and her mother, struggled to earn their own cutie marks.

Apple Bloom

An earth pony and Applejack's little sister. She is very close with Applejack despite her being overprotective. Apple Bloom is also friends with Zecora, a zebra who lives in the Everfree Forest.

Sweetie Belle

A unicorn pony and Rarity's younger sister. As her name implies, Sweetie Belle is a gentle little filly.

Scootaloo

A pegasus pony; although not biologically related to Rainbow Dash, she looks up to the confident mare as one and idolizes her. Despite having wings, Scootaloo cannot fly and rides on a scooter.

Benjamin

An adventurous, yet simple-minded boy out to save his world from the Dark King. Tends to shrug a lot.

Oh~ Mystic Quest! Plus the CMC. I'm assuming they'll be taking part in that one? Makes sense given that's one of the simpler and easier Final Fantasies.

7783430
You got it.

Grogar

Once known as the "Father of Monsters," this evil ram once ruled Ancient Equestria with the aid of his Bewitching Bell. His reign of terror ended when the Bell was taken away by Gusty the Great.

Well this last one is an eye opener. Now all the question is just which story he's going to show up in.