User blog comment:AlphaTheHD/Character Sheet: Alpha-493/@comment-29564364-20170705135449/@comment-29564364-20170705152202

Defense Power would take 50 damage (20HP + 30AP), leaving Alpha with 20HP and 50AP before the weapon damage. If the weapon alone deals 0-50 damage, Alpha is unscathed; If it deals 51-69, Alpha is damaged, but alive; And if it deals 70+ damage, he's dead.

As long as the attack doesn't bypass defenses, Defense Power will always absorb the damage directed at both the target and the defenses.