Each adventurer has an Innate ability, which is a special bonus which only applies to that adventurer: there is no way to change or pass along this ability to a different adventurer. Technically speaking, the innate ability is the only real difference between the characters.

Innate abilities can give improvements on Stats (like for Sheila and Ryall), or bonuses on chance formulas (like Desra and Burth).

The height of the bonus depends on the level of the adventurers: the formula is (LVL/10)*5%.