One of Yuna's guardians.
She and Wakka think of Yuna as a younger sister.
Lulu's stoic and self-possessed nature makes her seem insensitive
at times. She specializes in the art of black magic,
using various dolls to help cast powerful spells

Lulu specialty is magic so it's best to bring her in
against fiends that are weak against magic and strong against
physical attack. Since her magic are elemental base, so it's also a good idea
to use her against fiends that are elemental base as well. However, her weak physical
defense and low HP make her very vulnerable to physical attack but her high
agility help make up for her defense weakness.