The Duchess is a noble resident of Wonderland. The Duchess appeared again but now as a form of ally, as she no longer wished to eat Alice. In exchange for Pig Snouts, she sent Alice Duchess baskets as a reward.

She is at risk for removal. 

Her role entails more feminine operatic vocalization.
She is briefly in Act 1, in an early scene within the Vale of Tears. She has dialogue, and a song, and is not present throughout the rest of the show.