Loki isn’t the only one Thor has to worry about. In “Thor: Ragnarok,” the Asgardian will fight Hela, a new villain played by Cate Blanchett. Luckily, Thor won’t be facing her alone. His fellow Avenger, Hulk (Mark Ruffalo), will be able to help him out. Still, Ruffalo said it won’t be easy to defeat the villain.

“She plays the worst of the worst. So evil,” Ruffalo told “Entertainment Tonight.” “She is going to kill us. It’s such a great part she gets to play.”

Just how evil is Hela? The Marvel comics give fans some idea of what the villain will be like. “Thor: Ragnarok,” like all Marvel movies, is inspired by the comics rather than faithfully adapting them. Still, the source material indicates some of what audiences can expect.

Hela is appointed by Odin (Anthony Hopkins) to be the goddess of the northern realms of the undead, Marvel reports. She only has control over the souls that did not die in battle, but she wants warriors. She often attempted to take over Valhalla, the palace Odin created for Asgardians who died as heroes. Of course, her plans are always thwarted.

It’s easy to see why Hela is a formidable villain. Her powers include astral projection and incredible strength. She can also kill Asgardians with a touch and restore life to very recently deceased gods.

She has had quite a few storylines in the comic books, but it seems like the most relevant one is when she worked with Loki (Tom Hiddleston). They tried to start Ragnarok, the Asgardian apocalypse, according to Marvel Database. They attack Asgard and later send monsters to wreak havoc. Odin manages to stop them, but with Thor’s father seemingly missing at the end of “Thor: The Dark World,” the new film might have to figure out a different way to do that.

The movies also could change Hela and Loki’s relationship. Hela is Loki’s daughter in the comics. It seems unlikely that Hiddleston, 35, could have fathered Blanchett, 47, so the movies might ignore this fact. However, fans know Asgardians don’t age the same way humans do, so it’s possible that they’ll keep this odd father-daughter relationship.

“Thor: Ragnarok” is set to hit theaters on Nov. 3, 2018.