Barbara acts as a unique version of the Armor Knight, sporting high HP, DEF, and RES. What separates Barbara from her generic sisters is her much better ATK and Weapon Mastery. While Armor Knights generally rely solely on their DEF in combat, Barbara's high ATK makes it much easier for her to deal damage. Like most physical-type characters, she possesses low SP and INT Aptitudes, making her a weak magic-caster.
Barbara has excellent Mastery with Swords, Spears, Bows, and Axes; but has little ability with other weapon types.
Barbara also sports the Evility "Passive," which increases Attacking and Defensive Power by 50%, and allows her to Counter-attack even while defending.