Leta Lestrange and Newt Scamander Have a "Complex" Relationship 

Aside from Credence’s Obscurus and the light it shined on Dumbledore’s sister’s backstory, the most significant moment linking Fantastic Beasts and Where to Find Them to the wider Harry Potter universe was the name drop of Leta Lestrange. And when Leta actually appears in the forthcoming Fantastic Beast sequels, her relationship with Newt Scamander will be tricky.

Leta was an old friend — perhaps more — who was close with Eddie Redmayne’s Newt during his Hogwarts days before his mysterious expulsion. Even more intriguingly, she was a Slytherin while Newt was a Hufflepuff, which is perhaps the least common inter-House relationship. In Fantastic Beasts and Where to Find Them, she was played by Zoe Kravitz in photograph form. In a recent interview, Kravitz confirmed that she will be making onscreen appearances in several of the forthcoming four sequel films.

“I think there’s a few ahead,” she said in response to how many films she’ll appear in. “The relationship between Leta and Newt Scamander is a complex relationship, so I think there will be a lot of time for that to grow and develop, which will be fun.”

Although nether Fantastic Beasts nor J.K. Rowling has explained Leta’s relationship with Bellatrix Lestrange, it’s reasonable to assume she’s Bellatrix’s mother-in-law or aunt via marriage, as Bellatrix was originally a Black who married into the Lestrange family. As the Blacks are arguably the most fascinating and tragic family in the Potterverse, we can assume this “complicated relationship” won’t have a tidy ending. Recall that Queenie Goldstein told Newt that Leta was a “taker” where he needed a “giver.”

Further, in a separate interview, director David Yates has said, “She’s quite complicated and damaged and confused and Newt is absolutely still in love with her, so she has a kind of power over him.”

It sounds rather like a gender reversal of the Snape and Lily relationship dynamic. While all Potter fans are eagerly anticipating Dumbledore and Gridelwald’s relationship, Leta and Newt’s could prove to be equally as intriguing.