Protagonists:

Cerul Faron: (Chapter 1-10 Description) A young man with a strong sense of responsibility. Currently looking for his place in life.

(Chapter 21 Description) A soldier with a strong sense of responsibility. He joined Ganondorf's army, following Ganondorf's campaign of peace.

(Tier 0 Class: Freelancer)
(Class: Darknut Lord)
(Supports: Red Enrics, Garrath, Green (Potential A Support), Amari (Canon A Support), Link)

Red Enrics: A young rash boy, who ran from his parents. Attempted to join Ganondorf's army, but ran off after overhearing Ganondorf's true intentions.
(Class: Runaway)
(Supports: Cerul, Green (Canon A Support), Neon, Garrath, Gerald)

Green Marion: A young lady in search who left to search for Red. After noticing Red had ran away, her friends convinced her to stay with Ganondorf's troops...for now.
(Class: Darknut General)
(Supports: Red (Canon A Support), Cerul (Potential A Support), Garrath, Gina, Amari, ???)

Neon Mercilion: (Chapter 1-10 Description) A Goriya with a special talent for swordplay. Lives with his family in Kokiri Forest.

(Chapter 11-20 Description) A Goriya with a special talent for swordplay. Joined Ganondorf's troops to avenge the death of his entire village from bandits. Married to Gina Valience.
(Class: Darknut Gladiator)
(Supports: Gina (Auto A Support, ala Pent, meaning you can still get convos.), Dieter, Falx, Red)

Playable Units:

Garrath: A seemingly young man whom, age wise, is immortal, thus, is 1000 years old. One of people who trained Cerul, Red, Green, and Neon in weaponry. An author of multiple stories.
(Class: Paladin)
(Supports: Cerul, Red, Green, Gerald, ???)

"Leif": The protagonist of the 5 gaiden chapters. Not really much is known about him, other than he seems relatively skillful in sworplay.
(Class: Myrmidon)

Gina Valience: Neon's wife. She's relatively skillful with a bow, and tends to think of alternate solutions to problems. Support wise with Neon, think Pent and Louise.
(Class: Archer)
(Supports: Neon (Auto A Support), ???)

Amari Vanatrice: The adopted daughter of Cerul's teacher. Strong, brave, and loyal.
(Class: Wyvern Rider)
(Supports: Cerul (Canon A Support), Green, Link (Potential A Support), Gerald)

Link: The self-proclaimed hero himself. Joins Cerul shortly after he betrays Ganondorf's troops. Arrogant, and Headstrong.
(Class: Villager (Can promote to a Mercenary or a Myrmidon.))
(Supports: Cerul, Amari (Potential A Support), ???)

Gerald: A man whose abilities are very similar to a character fought earlier on in the story. While he's very strange in how he comes at first, his supports better elaborate why he's there. He acts as sort of the Gotoh of the game, as he's really good, especially if you got bad RNG luck with other units, though he's obtained about 4-3 chapters before endgame, and gets supports very quickly with other units as such.
(Class: ???)
(Supports: Red, Amari, Garrath (Potential A Support Ending))

Volga: A hotheaded Dragon knight travelling to hone his skills

Other Units:

Death Knight: His real name unknown, he is the teacher of Cerul, Red, Green, Neon, and Amari. After the group betrays Ganondorf's army, he is forced to fight them lategame, Camus style.
(Class: Death Knight)

Unfinished Units:

4 Gold Captains:

Knight - Dieter
Merc - Falx
Shaman - Woltar
Thief - Erick