Heroes are the playable characters of Heroes of Order and Chaos.  They are seperated into four main categories (Guardian, Mage, Fighter, and Support), although some characters act as a hybrid.  For example, the Grey Witch can be considered a Support character, but can also fall under the Mage category as well.  


Guardians can act as both tanks as well as a melee dps character.  They have the largest HP and DEF stats.


Support heroes can generally aid friendly heroes in battle, while still being able to DPS on their own.


Mage heroes rely on magical attack (M-ATK) to deal damage to other players.  


Fighters use mainly melee attacks to inflict physical damage (P-ATK) on others.