Gianna

 is an Imperial chef found at Castle Dour. She reveres The Gourmet for his culinary prowess.

Impersonating a star
After killing the Gourmet at the Nightgate Inn, Astrid sends the Dragonborn to impersonate him at Castle Dour, where Emperor Titus Mede II is expected to dine.

Poisoning the stew
Arriving in the kitchens, Gianna asks the Dragonborn to put a Chef's Hat on, if they are not already wearing one, and subsequently glows at their "brilliance". She then asks which ingredients should be added to the stew. The specifics of the ingredients do not matter, so long as the Dragonborn adds Jarrin Root as the secret ingredient.

Killing the emperor
Gianna and the impersonated Gourmet carry the food to the dining hall, where a fake Emperor consumes the poisoned meal. The guards attempt to place the Dragonborn and Gianna under arrest, but the Dragonborn escapes before they can do so.

STARE AT HER BOOBS

Reactions based on race

 * Altmer - She says that she didn't expect the Gourmet to be an Altmer, and muses about the Summerset Isles' cuisine.
 * Argonian - She says that she didn't expect the Gourmet to be an Argonian, and believes that you were taught somewhere else besides Black Marsh.
 * Bosmer - She says that she expected the Gourmet to be a Bosmer, confessing that she believes their knowledge of herbs is helpful when making dishes.
 * Breton -She says that she didn't expect the Gourmet to be a Breton, thinking that its too obvious because most great chefs come from High Rock.
 * Dunmer - She says that she didn't expect the Gourmet to be a Dunmer, and that it must have been hard to become a chef, considering Morrowind's cuisine.
 * Imperial - She says that she didn't expect the Gourmet to be an Imperial. She also said that she expected that the Gourmet would be something "more exotic".
 * Khajiit - She says that she didn't expect the Gourmet to be a Khajiit, and that they should be worried about hair going in the stew.
 * Nord - She says that she didn't expect the Gourmet to be a Nord, but believes that Skyrim is a decent place to learn to cook.
 * Orc - She says that the last person she expected the Gourmet to be is an Orc, and then realizes the secrecy.
 * Redguard - She says that she didn't expect the Gourmet to be a Redguard, and thought you were a Bosmer instead.

Quests

 * To Kill An Empire

Bugs

 * Gianna may not progress the quest. This problem occurs when a player is diseased. Multiple diseases cause this problem. This problem was fixed in one of the patches.
 * Rather amusingly, after the 'Emperor' is killed, Gianna will walk out of the room still holding the pan, and head to the kitchen, walking. If you talk to her, she says nothing but 'I'm so nervous'.

Appearances

 * The Elder Scrolls V: Skyrim