Pass (Japanese: すり抜けThrough) is a field skill which debuted in Fire Emblem: Radiant Dawn. It allows its user to pass through spaces on the map which are currently occupied by enemy units. It originated as a personal skill, but in Awakening and Fates it is a class skill learned by Assassins and Adventurers respectively, and in Heroes it is a three-tiered type B passive skill (whose individual tiers are known as Pass 1, Pass 2, and Pass 3 in order from lowest to highest).
The Heroes version of the skill only activates its primary effect should its HP be above a certain threshold, but also has the secondary effect of negating an Obstruct skill; the threshold needed to activate the skill decreases with the skill's tier.