This 16-year-old ninja spent most of her time preying on helpless travelers until she met up with Cloud's party.  Although she is reluctant to join AVALANCHE, her ulterior motives give her reason to tag along, if only temporarily.  Her clever wit and ninja skills coupled with her selfish ways either make her a powerful ally or a serious pain in the neck.

Level 1:  Greased Lightning-- Yuffie hits a single opponent with a quick attack that causes massive physical damage.  Greased Lightning does enough damage to eliminate weaker opponents, but it's well outdated by the time you recieve the first of Yuffie's Level 2 Limit Breaks.  Clear Tranquil--  A blue orb surrounds each party member and restores a small portion of each charachter's Hit Points.  Early on, this Limit Break is helpful for curing your allies, but the amount of damage enemies cause plus the party's increased HP will soon be too much for Clear Tranquil to be effective.
Level 2:  Landscaper-- Yuffie causes a large tremor that forces the ground beneath a group of opponents to rise and explode, which causes massive damage to her enemies.  Use this Limit Break solely against groups of enemies.  The damage isn't cumulative, so its effect is drastically reduced against a lone enemy.  Bloodfest-- Yuffie attacks a group of enemies with a series of 10 deadly blows.  Unlike the Landscaper, this is effective against a group or a single enemy.  The individual attacks are weaker than the Landscaper's single attack, so it's wise to limit its use to small groups.
Level 3:  Gauntlet-- Summoning a blue vortex beneath her opponents, Yuffie causes a large amount of damage to an entire group of enemies.  Gauntlet causes a large amount of damage, but it's not cumulative.  Keep it reserved for large groups of enemies or at least weak individual opponents.  Doom of the Living-- Much like the Bloodfest attack, Yuffie moves about the screen and hits her opponents with a long series of deadly blows.  The only real difference between the two is the amount of damage inflicted.  The damage from the attack is cumulative, which makes it better against a single enemy than Gauntlet.
Level 4:  All Creation-- Yuffie recieves her All Creation Limit Break for defeating Godo, her father, at the top of the Pagoda of the Five Mighty Gods (in Wutai).  Yuffie blasts her opponents with a huge beam of iridescent light.  This attack causes a huge amount of damage to an enemy or enemies.