Power of Individuals

Mortal Class A
Class A mortals are ordinary human beings. They may possess some magic or vampirism (though the latter is rarer, as vampires often keep their children away from human beings until they can control their powers), but on the whole have no special fighting skill or overall power.

Mortal Class B
Class B mortals are also normal human beings, but they have extensive training on their abilities. Notable Class Bs include Oliver, Ingrid Steelbeak, and Ariel Richardson.

Mortal Class C
Class Cs have extremely advanced power and fighting skill. They are abnormally powerful for their groups and can easily survive battles against multiple experienced opponents. Some Class Cs, such as Scorpio, have even held their own against Invulnerables.

Most of the Dark Defenders are Class Cs, with a few exceptions such as Ingrid and Ariel.

Invulnerables
The Invulnerables are the heavyweights of the magical levels. Able to defeat and kill Class A and B mortals with ease, they wield devastating magic. Currently, Bluebird is the only (considered) Invulnerable to not have some sort of magical ability.