The Luminary vocation in Dragon Quest VII: Fragments of the Forgotten Past for the Nintendo 3DS is an intermediate job that combines battling with the art of singing and dancing. They're stylish warriors capable of mastering a number of musical ditties that can devastate enemies in the right circumstances.
How to become a Luminary: Visit Alltrades Abbey and make the switch after mastering the Jester, Dancer, and Troubadour vocations. True to Dragon Quest tradition, Jesters would rather goof around than fight, but Dancers and Troubadours are capable of singing songs and performing dances that can buff the party or debuff / damage the enemy.
Stat boosts and detriments: Luminaries take a substantial hit in their base stats, but get a significant Style increase.
Magic and Abilities Learned:
Level One: Dazzleflash (Emit a bright flash that may cause enemies to miss attacks)
Level Two: Kaclang (Turns allies into iron, preventing them from attacking or being hurt by enemy attacks)
Level Three: Spooky Aura / Harvest Moon (Reduce one group of enemies' resistence to magic / Damage all enemies with a spinning attack)
Level Four: Focus Pocus (Restores some of the caster's MP after every turn)
Level Five: Cursed Verse / Gritty Ditty (Causes all enemies' defense to drop / Increases all allies' defense)
Level Six: Hustle Dance (Restore about 70 HP to all allies)
Level Seven: Kerplunk Dance / Pyre O' Fire: (Sacrifices user to revive fallen allies at 100% HP / Deal heavy fire damage to one enemy)
Usefulness: The Luminary has some handy dances on-hand, including the Hustle Dance and Pyre O' Fire. Gritty Ditty is also handy to have around. That said, Luminaries don't pack half the wallop of other intermediate classes that require low MP use, like the Monster Masher. You need to master the Luminary class if you want to become a Druid, one of the advanced classes. Since Aishe's already mastered the Dancer class by the time she joins your party, that's a bit of a time-saver right there.