Passionlip (パッションリップ) is a character resembling Sakura Matou and BB (Fate/extra) in Fate/Extra CCC. She has had part of her arms turned into gigantic talons, and her identity is unknown. She will initially be friendly to the Protagonist, but orders from her "mother" will force her to attack them. Her face resembling that of BB is also a trait shared by Meltlillith.
Source: Type-Moon wiki
She is introduced as a limited servant in "Fate/EXTRA CCC Collaboration Event" event in April-May 2017. Her class is "Alter Ego", a new servant class introduced in the same event based on her role in Fate/Extra CCC.