No doubt one of the coolest-looking Nightfarers, Duchess's unexplained absence from the character selection screen is a little bizarre when you begin your war against the Nightlords in Limveld. All but two Nightfarers are available from the get-go, so it's important you know how to unlock Duchess in Elden Ring Nightreign if you want to collect the full roster.
The Duchess is a high dexterity and intelligence Nightfarer, focused on staying light on her feet while performing quick combos with daggers. Using her Restage skill, you can dump massive damage into targets in a very short amount of time. The downside is that she's very much a glass cannon, so don't get caught.
