Symbol Motif Clothing: In the DS version, each of the four heroes has a particular symbol or patterning in their shown Freelancer/normal clothing that pops up in many of their job outfits. Luneth has the pattern of his vest of belts and a 3x3 checkered pattern similar to them, Arc has the "X" shown on his belt buckle or his yellow scarf, Refia has the cross on the clasp of her vest, and Ingus has the teardrop shape of his pendant, or just continues to wear it. Here's◊ a◊ few◊ examples◊.
The main protagonist of the DS remake, he's an orphan from Ur raised by the village priest, Topapa.
Bishōnen: He's very pretty, with purple eyes and silver hair.
Too Many Belts: Though quite tame in comparison to the likes of Lulu and others who made the trope famous, Luneth stands out for having a vest made up of three large, thick belts wrapped around his torso. The patterning of said vest reappears on many of his outfits in the different jobs.
Luneth's studious best friend, who is also from Ur and raised by Topapa.
Handsome Lech: The first thing he says after they gain the Airship? Surrounded by different girls from different places, no matter the fact that he has a sick girlfriend that falls sick in the first place because he leaves her village. Refia has to keep him in line.
Magic Knight: He uses either a sword or a Thunder spell when he appears in battle.
Older Than He Looks: The more he climbs the Tower of Owen, the more memories he unlocks; including the memories that he was the one who built the tower and the reason why. We only hear a brief explanation, but Saronia Library gives the more detailed one. Desch and his father belonged to the Ancients, a race that went into hiding after their actions caused the Flood of Light 1000 years ago. They created the tower to separate the Crystal of Wind and Fire along with the whole Floating Continent to lessen the Flood and to give the Warriors of Darkness their chance to stop it altogether.
Distressed Damsel: Subverted. Everyone assumes that she's been kidnapped by the Djinn, because she and the ring are gone. You find her in his lair, on her own and quite un-kidnapped, having decided to go and seal him herself.
Heroic Sacrifice: Taking the Bullet for Luneth. The frenzy of a boss battle and an earthquake immediately after are possible reasons why the Light Warriors don't try to revive her.
Ill Girl: When the party first meets her, she's bedridden from the darkness. An elixir cures her.
Last of Her Kind: There are subtle hints that implied the Maidens of Water were from a large tribe, but slowly began dying out to prevent the Flood of Darkness from consuming the world while waiting for The Chosen One, and they still have to keep surviving because they are the only ones who can break the Crystal Shard's seal. Aria is the last one of them, and by the time The Chosen Ones finally come, she's already dying and bed-ridden.
Who Wants to Live Forever?: Doga and Unei agree that the gift Xande received from Noah, the gift of Mortality, was the greatest of them all. Xande disagrees.
Warriors of Darkness
The dark counterparts to the Warriors of Light, they are a quartet of Warriors who rallied to defend the World of Darkness from being swallowed by the light many years ago. The Warriors of Light seek their aid in the battle against the Cloud of Darkness.
Heroic Sacrifice: They Zerg Rush the Cloud of Darkness and weaken her so that the Warriors of Light have a fighting chance to save their world.
Yin-Yang Bomb: It takes the powers of both Light and Dark to defeat Cloud of Darkness this time around.
The third student of Noah who trained with Doga and Unei. While Doga and Unei got great powers from Noah, Xande's gift from their master was mortality when previously the four of them were all immortals. Outraged at this snubbing, Xande sought to destroy the Crystals and cause a flood of darkness that would trap the world in temporal stasis, allowing him to avoid dying.
The Archmage: He's not as powerful as Doga, but he's still a very powerful mage.
Immortality: His main motivation. He was once an immortal, but he was given the gift of mortality by his master. He is willing to do anything to keep himself from dying. Up to and including flooding the world with darkness and freezing time for anyone, himself included. So long as he can prevent himself from dying, he's willing to make any sacrifice.
Orcus on His Throne: He spends the majority of the game up in the Crystal Tower. (It probably has a heck of a view.)
Out of Focus: Xande is the Big Bad for most of the game, and he was the first villain with an established backstory and a goal besides Taking Over The World. However, odds are most people know the Cloud of Darkness as the villain. Dissidia: Final Fantasy has a lot to do with that, as does the fact that the only time you actually meet Xande in person is when you fight him near the end of the game.
Sorcerous Overlord: A number of the bosses that the Warriors of Light face are acting under his orders.
Woobie, Destroyer of Worlds: The guy used to be an immortal sorcerer who had his immortality taken from him while Doga and Unei got more power than ever. You'd probably be a bit upset too.
Cloud of Darkness
An ancient entity that is the embodiment of nothingness, she appears when the powers of light and dark are unbalanced to return all to the Void.
Ambiguous Gender/No Gender: Word of God officially stated that the Cloud of Darkness is actually genderless despite appearing as a woman. Even so, many people and in-game characters still use female pronouns when addressing the Cloud of Darkness.
Complete Immortality: Part of the timeless and eternal Eldritch Abomination deal, of course. You can destroy her body, yes, but all it really does is drive her back and force her to go into a slumber until she gains enough power to become active again, in which case she'll try to physically manifest all over again.
Dark Is EvilandLight Is Not Good: Too much of either element causes a "flood" that summons her presence. Dissidia's prequel, Dissidia : Duodecim Final Fantasy, gives her a third costume◊ meant to represent her appearance as the commonly-speculated "Cloud of Light".