Unlike most other d20 System games, Anime d20 uses combat Skills in addition to combat Feats.
Offensive combat Skills are treated exactly like Skills for any other action — they serve as a bonus to a character’s dice roll.
Defensive combat Skills are applied to the character’s defence roll when defending in an appropriate situation.
For example, a character with Defence Combat Mastery at Rank 2, a Dexterity of 11, and Melee Defence (Sword) at Rank 3 is wielding a sword and attacked by an opponent in melee combat. His Armour Class is normally 2 (+0 Dex modifier and +2 from the Defence Combat Mastery). When defending with his sword, he gains a +4 bonus to his defence roll (+3 for the Melee Defence Skill Rank, and +1 for the Sword Specialisation), but only against melee or unarmed attacks. If another character attacks him with a gun, thus initiating a ranged combat attack, he makes a defence roll without a bonus since he does not have the Ranged Defence Skill.