Nagini
In Fantastic Beasts: The Crimes of Grindelwald, Nagini (Claudia Kim) is the main attraction of a circus freak show. As a Maledictus, she carries a blood curse that will eventually transform her to a snake fully. At the circus, she befriends Credence Barebone, who does menial work there.
Leta Lestrange
In Fantastic Beasts: The Crimes of Grindelwald, Leta Lestrange (Zoe Kravitz) is an emotionally damaged young woman who exerts some control over Newt Scamander, who was once in love with her. She comes from a wealthy, pureblood family notorious for embracing the Dark Arts that includes the likes of Bellatrix Lestrange.
Gellert Grindelwald
In Fantastic Beasts: The Crimes of Grindelwald, Gellert Grindelwald (Johnny Depp) is a powerful and infamous dark wizard who causes mass chaos and terror around the world, seeking a new Wizarding World Order based on his belief in wizarding superiority. After Grindelwald escapes a prison transfer, Newt Scamander and Tina Goldstein join forces with Albus Dumbledore to bring him in.