Devil Durian Fruit
The Devil Durian Fruit is horrifyingly odorous fruit that releases a stench so bad bugs wont come within half a kilometer radius of it. The extract of the fruit can be used to make a powerful repelling fragrance which can be used to drive away vicious animals. However due to its overwhelming effectiveness, it is restricted from being used by the Eight Gourmet Laws.
Rin uses the extracted fragrance of the Devil Durian as part of her fragrance arsenal without restriction, likely due to being an IGO employee.