Players often optimize their 12 recruitable characters by focusing on specific roles:

Certain characters, like Magnolia, require specific late-game sidequests such as "Falfalaran Sings the Fairy" to unlock.

Focus on AGI and Crit Rate crystals. Linking her with a magic dealer like Ba'Thraz allows you to swap in area-of-effect (AoE) damage when physical attacks are resisted.

Speed (AGI) is the most critical stat. High AGI characters like Sienna can act multiple times before an enemy moves, effectively multiplying their total damage output.