Not all done, I just got the general idea

Nils ( ChromtheChrommander you inspired this)

Title: Draconic Bard

Unit: Green Dragon

Summonable: 5*

Description: Ninian's brother and a traveling bard. Appears in Blazing Blade

Weapon: Ice Breath+

Assist: Play (gives unit another turn)

Skills

A: Swift Strike

C: Hone Attack

Sain

Title: Flirty Knight

Unit: Sword Cavalier

Summonable: 3*-5*

Description: A knight of Lycia. Appears in the Blazing Blade

Weapon: Ruby Sword+

Special: Holy Vestments

B: Wings Of Mercy

C: Fortify Defense

Halloween Heroes

Vampire Reinhardt

Title: Hollow's Thunder

Unit Type: Blue Mage

Summoning: Yes, this is not how I normally look, but anyways I am Reinhardt of Freige.

Weapon: Vampiric Fangs (recovers 1/3 of damage dealt) (Also can grab Dire Thunder since it is still Rein)

Skills

A: Bloodlust (Renamed Fury)

C: Bounty (Unit gets 1.5 times more Hero Merit for every enemy unit that this unit defeated)

Duma!Berkut

Title: Possessed Prince

Unit: Lance Horse

Summoning: Death to all of you.... Maybe not this lot though....

Weapon: Kriemhild (distant counter and +4 to res)

Skills

A: Fury

B: Darkness Boost (No unit in combat with him can double or counterattack, same applies to him. Brave Weapons can still double like normal)

MSF! Lukas (it happened)

Title: Crazed Doctor

Unit: Dagger Wielder

Summoning: I see you have called me. I hope that my precious Clive is with you.

Weapon: Syringe+ (when attacked, foes cannot move for a turn)

Skills:

A: Close Counter

B: Poison Strike

C: Breath Of Life

Zombie Marth

Title: Altean Corpse

Unit: Axe Infantry

Summoning: Wragh! Oh! Sorry, I didn't mean to frighten you, this was all Caeda's idea.

Weapon: Cleaver (Distant Counter)

Special: Luna

Skills:

A: Obstruct

B: Wings of Mercy

C: Threaten Speed

CeliFaye (Faye dressed like Celica)

Title: Princess Poser

Unit Type: Red Mage

Summoning: Hi I'm Celica, just kidding, the name's Faye

Weapon: Ragnarok

A: Warding Blow

B: Wings Of Mercy

C: Spur Defense