Unlike most tactical role-playing games, the border of the battle maps do not have barriers around their edges. Most characters and objects can be thrown off, hit off, fall off, or slip off of the field of battle and sent O.B. (out-of-bounds). Characters and objects that are O.B.'d are gone for the rest of the battle. When an enemy is O.B'd, the level of each of the remaining enemies rises by one, so the player can trade a large force of weak enemies for a smaller number of stronger ones. If the enemy's HP is reduced to zero before it is thrown out of the stage, its allies will not be granted a level up. The last enemy on the map cannot be thrown O.B., and Marona's team members do not gain levels for falling out of bounds.