Adze Ramanga was the daughter of Ramanga who Vlad is engaged to. She is furious when Vlad insults her honour and plots revenge against him and Erin. After fatally wounding Erin she is imprisoned but Malik later releases her, so she can lead him and the Count to her father. In Season 4 episode 9 the shapeshifter taking the form of Bertrand invites her for a meeting with Mina Van Helsing and Vlad about the ceasefire, however it results in a big confusion and Adze tries to bite Mina but being a trained slayer Mina stakes Adze in front of Vlad.
NOTE:Thanks to the shatters of Rings of Arianrhod stuck on Erin as a vampire,it is possible that Erin's evil side is a reindercation of Adze's.