Since Yuna already knows the Cure spell and will learn many more protective and restorative spells as she travels across the Sphere Grid, bring her into the action whenever other party members need healing or status ailments cured. Her physical attacks are ineffective, but by summoning aeons Yuna can cause more damage to enemies than any other character.

Yuna will quickly learn useful skills like NulFrost and NulBlaze, which negate the next corresponding elemental attack on the party. Eventually, she will become the backbone of the party by learning spells such as Shell and Protect, which are effective at decreasing damage to characters from magic and physical attacks.

Her Magic attribute will quickly rise during the trek across her section of the Sphere Grid, enabling her to restore more HP to characters with each increase. Teaching her black magic spells, such as Flare and Ultima, is a good idea.

Yuna's Overdrive is Grand Summon. Any aeon summoned will appear with a full Overdrive gauge. After the aeon uses its Overdrive attack, its gauge will revert to its previous condition. Thus, the previous gauge wasn't wasted.