Nerussa is an altmer publican, avid collector of wine, and owner of the Wawnet Inn. She asks the player to bring her the notoriously rare Shadowbanish Wine so she may add it to her collection.
"Well, apparently the wine is so rare because it was only made in one tiny batch. It’s the product of an alchemist who was also a vintner. Besides tasting incredible, the magic within the wine allows the imbiber to be gifted with Night Eye! The vintner made it special for the Legion soldiers posted at the forts when they were active long ago. It was perfect for keeping lookouts warm on cold nights and helping them see better in the dark. Clever, eh?" -Nerussa