Lulu is one of the many guardians of Yuna and a good friend of Rikku

She has made a pact to accompany Yuna all the way through the summoners pilgrimage as one of her guardians.

SHe practices powerful, mainly elemental, black magic.

Dolls

These are the weapons Lulu uses in battle.

Moogle

Stinger Mog

Attack Mog

Magical Mog

Buster Mog

Rune Mog

Variable Mog

Morphing Mog

Power Mog

Magician Mog

Medical Mog

Mana Mog

Soul of Mog

Trapper Mog

Space Bandit

Space Warrior

Space Mage

Space Power

Space Energy

Space Force

Space King

Space Master

Space Soul

Moomba Warrior

Moomba Mage

Moomba Force

Water Moomba

Thunder Moomba

Ice Moomba

Fire Moomba

Moomba Duo

Moomba Trio

Moomba Quartet

Cactuar Scope

Cactuar Spy

Swift Cactuar

Booster Cactuar

Prism Cactuar

Raging Cactuar

Vengeful Cactuar

Cactuar Wizard

Magical Cactuar

Lord Cactuar

Star Cactuar

Comet Cactuar

Blinding Caith Sith

Quiet Cait Sith

Sleepy Cait Sith

Noxious Cait Sith

Fossil Cait Sith

Late Cait Sith

Fatal Cait Sith

Ominous Cait Sith

Dark Cait Sith

Mute Cait Sith

Dreamy Cait Sith

Toxic Cait Sith

Stone Cait Sith

Chronos Cait Sith

Wicked Cait Sith

Abaddon Cait Sith

Chaotic Cait Sith

Onion Knight
Story

Lulu — born on the island of Besaid, where she grew up with Wakka, Yuna and Wakka's younger brother, Chappu — is often stern and scathing (particularly to Wakka), and doesn't smile very often. However, she is nonetheless kind-hearted and caring toward others. She is also highly intelligent, and is one of the few Yevonites who easily questions the Yevon religion on objective terms. Nonetheless, she is still shaken by the hypocrisy of the Yevon order, though she adjusts to this reality faster than some of the other former believers in her party. Before becoming a guardian to Yuna, Lulu guarded two previous summoners whose pilgrimages abruptly ended before reaching the Zanarkand Ruins. The pilgrimage of the first summoner Lulu guarded, Lady Ginnem, was cut short by her unfortunate death in the Cavern of the Stolen Fayth, taking place during an attempt to acquire the Aeon Yojimbo. This event still troubles Lulu's memories, but when Yuna and company detour to the valley where the cave is located, Lulu decides to follow and face her painful memories. At the back of the cave, the group meets the unsent form of Lady Ginnem, the human personality she once held all but completely buried in enmity for the living. Lulu felt that she must fulfill a last duty to Ginnem as a guardian in ensuring that her spirit would depart to rest peacefully on the Farplane. After fighting and defeating Yojimbo — the aeon having been summoned by Ginnem — Ginnem's spirit departs for the Farplane. The pilgrimage of Father Zuke — the second summoner she served as guardian to, together with Wakka — did not even get that far. It ended at the Calm Lands, as he chose not to continue his pilgrimage, a decision many summoners make when they reach those plains.

Lulu is very protective of Yuna and also respectful of the decisions she makes. When Seymour Guado proposes marriage to Yuna, Lulu is supportive of the union, as it will give the people of Spira some happiness as well as furthering relations with humans and the Guado. While Tidus is against any marriage, Lulu cryptically responds that she would like for Yuna to marry for love, but not for her to marry the one she loves, knowing full well who he is.

Prior to his death at the hands of Sin, Lulu had been romantically involved with Wakka's younger brother, Chappu, and his passing left a deep wound in Lulu's heart. However, Wakka and Lulu find love for one another, and six months after the ending of Final Fantasy X, are wed to one another. In Final Fantasy X-2 Lulu is pregnant with — and gives birth to — Wakka's child, a boy whom Wakka names "Vidina" (the Al Bhed word for "future").