Unlock the following characters for play in Multiplayer and Quick Battle modes by beating the corresponding chapters in Story mode:

CHARACTER - HOW TO UNLOCK
Cyrus (wizard) - Beat Chapter 5 (Nadia). Cyrus is equipped with the Staff Of Explosia, which damages units it lands on and then explodes for more damage three turns later.
Findan (elf) - Beat Chapter 1 (Anwen). Findan is equipped with the Swift Strike, which reduces charge time for all formations to 1.
Jezebeth (demon) - Beat Chapter 4 (Aidan). Jezebeth is equipped with the Wall Crusher, which explodes enemy walls and damage nearby units.
Markal (undead) - Beat Chapter 3 (Fiona). Markal is equipped with the Death March, which instantly charges all Elite and Champion units.
Varkas (human) - Beat Chapter 2 (Godric). Varkas is equipped with Elrath's Sword, which tears through the first two enemy rows.