During The Elven Maiden, she is framed for stealing the bust of Llathasa Indarys, and Lex arrests her. It is possible that she is related to Mivryna Arano in Black Waterside Stables due to a similar name and Tanasa Arano in Riverview, which are both in Cheydinhal.
A beggar told the Hero that if they want to find the Gray Fox, they should look for the Garden of Dareloth in the Waterfront District of the Imperial City around midnight. The Gray Fox is the only clue they have to the mysterious Thieves Guild.
The Thieves Guild has a need to "acquire" Llathasa's Bust from her tomb. While the job looks simple, it has more to it than a simple theft.
"Take this. It's from a friend."
"I don't have time to talk."
- Mysterious Note "Hey, I don't read them. I just deliver them."
"I have things to do."