Jeanne in the Bottle

Jeanne – a dancing genie that lives in a bottle; she transforms into smoke, a fairy-sized girl and a human-sized girl.

Her Advanced version greatly improves the travelling party's morale (by the coefficient of +2 no less, in abstract party morale units >.>) and can be used as an endless torch inside dungeons, also casts a flaming aura to protect herself from hostile creatures.