<Li> Cate Blanchett as Hela: Odin's first child, Thor's older sister and the goddess of death, based on the deity Hel, who is inadvertently released from her prison . Screenwriter Eric Pearson did not pitch the idea of Hela being Thor's sister to the producers, including it instead in one of his drafts at the encouragement of executive producer Brad Winderbaum . The decision to make Hela related to Thor, as opposed to Loki as in the comics and Norse mythology, came from needing more impact with Hela and Thor's final confrontation . By making the change, Pearson felt Hela became "the thing that (represents) what it is to rule Asgard, (Thor's) family, what he's been told, what he hasn't been told ." Blanchett talked about the difficulty of playing the role in a motion capture suit rather than costume, feeling the character's headdress is "such a huge part of when she comes into the height of her powers in the film". Hela's design was taken from Thor: God of Thunder by Jason Aaron, while the character Gorr from that comic, who has the ability "to manifest an infinite number of weapons", inspired a similar ability for Hela . Blanchett worked with stuntwoman Zoë Bell and Hemsworth's personal trainer Luke Zocchi, and studied capoeira for the role . </Li> <Li> Idris Elba as Heimdall: The all - seeing, all - hearing Asgardian former sentry of the Bifröst Bridge, based on the deity of the same name, who has gone into self - imposed exile during Loki's reign . After Hela invades Asgard, he helps to hide its vulnerable citizens . Describing Heimdall's character arc in the film, Winderbaum says, "he's gone from this elder statesmen, the gatekeeper to Asgard, to this badass warrior - wizard character who lives in the hills and kicks a lot of ass throughout the entire film ." </Li> <Li> Jeff Goldblum as Grandmaster: One of the Elders of the Universe, who rules the planet Sakaar, and enjoys manipulating lesser life - forms . Goldblum described the character as "a hedonist, a pleasure - seeker, an enjoyer of life and tastes and smells". He also said that Waititi encouraged improvisation in order for Goldblum to "make (the character his) own". Waititi explained that Grandmaster does not have blue skin in the film as the character does in the comics, because Goldblum had already played a blue - colored character in Earth Girls Are Easy, and because Waititi did not want to detract from Goldblum's personality by concealing his appearance . Grandmaster is the brother of Benicio del Toro's Collector from Guardians of the Galaxy, and producer Kevin Feige expressed interest in seeing the two together in a future film . </Li> <Li> Tessa Thompson as Valkyrie: A tough, hard - drinking Asgardian slave trader, based on the mythological being Brynhildr, who was once a legendary warrior of the Valkyrior and now works for the Grandmaster under the designation "Scrapper 142". Thompson said the various versions of the character from the comics "left us a lot of leeway" in creating the film version . Waititi "wanted to make sure we weren't making a female character that was boring and pretty", and Feige said Marvel wanted to pair Thor with a love interest more his equal than Jane Foster . Co-screenwriters Craig Kyle and Christopher Yost's original draft of the film had more of a romantic relationship between Thor and Valkyrie . When Pearson started working on the film, he moved away from that storyline, instead focusing more on "the mutual respect" between the characters and Valkyrie "dealing with her PTSD . She's someone who's drowning her sorrows in the bottle, and I just thought that was such a cool thing that you don't often see". Thompson was inspired by pictures of Linda Hamilton as Sarah Connor in Terminator 2: Judgment Day while training for the role, and worked with dialect coach Andrew Jack to create an Asgardian - sounding accent that was different enough to sound like she had been away from there for a long time . Thompson will appear in future MCU films . </Li>

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