Aid is a character stat that has made appearances in many games throughout the series, although it has gone by many different names and formulas. Essentially, a unit's Aid stat is the maximum Constitution/Build that another unit can have for the first one to be able to Rescue them. The highest Aid stats are usually attributed to mounted units, such as cavaliers and wyvern riders.

In most infantry units, the aid stat is one less than the unit's constitution. In mounted units, however, it a value with variance in calculation based on the unit's gender. For male units, it is most often calculated as 25 minus the character's Constitution. For for female units, it is most often calculated as 20 minus the character's Constitution.

Trivia

• In the GBA games, Aid for mounted player units is, as explained above, set at (25-Con) for male units and (20-Con) for female units. However, non-player generic mounted units all use the 25-Con calculation regardless of gender.