Comments from actor Karen Gillan has Marvel fans speculating about the future of Nebula in Avengers 4. Will the notorious loner forge an unlikely friendship with one of the Avengers?

In an interview with Fandango from last August, Gillan teased she would find a new best friend in Avengers: Infinity War.

“I know who her BFF is,” Gillan said. “And I can’t tell you. I can’t. I promise you it’s brilliant and unexpected and just so good.”

Although these comments came in the buildup to Avengers: Infinity War, her role in the film was relatively diminished, and she certainly didn’t become best friends with anyone. People are now turning their attention to Avengers 4 as the movie when Gillan’s Nebula will build a relationship with one of the Avengers.

As for who that might be, there are a few distinct possibilities. The most likely is with Iron Man, as both he and Nebula were stranded on Titan following Thanos’ snap. Nebula could also potentially become friends with Rocket, whom she might share a familial connection with.

Others have speculated that Nebula could become friends with Black Widow; the two are both calculating and strong, with similarly murky backgrounds where they learned to be killers from a young age. Or could it be Captain Marvel?

Avengers: Infinity War already saw Thor and Rocket form an unlikely relationship, so fans of the Marvel Cinematic Universe are used to seeing weird pairings. Nebula will be even more of a challenge since the character is typically a loner.

With the knowledge that her sister has been killed by Thanos, the circumstances could drive Nebula to work closely with the Avengers in order to get her revenge. Along the way, don’t be surprised if she becomes buddies with one of the few Avengers who are left.

Avengers 4 hits theaters on May 3, 2019.