Alistair Krei

"Oh, I can be cool, if you do what I want. Or I can be ice cold."

- Krei explaining his morality after blackmailing Big Hero 6.

Alistair Krei is a major character Disney's film Big Hero 6, and a recurring antagonist in Big Hero 6: The Animated Series. He is the owner and CEO of Krei Tech Industries who is always on the hunt for the next big thing, and an occasional ally of Big Hero 6. While not a villain in the film, he shows a more malicious and manipulative side to himself in the series, thus making him

He is voiced by Alan Tudyk, who also voiced Turbo, the Duke of Weselton, Duke Weaselton and Ludo.

Big Hero 6
In the film, Krei is first seen at the San Fransokyo Institute of Technology convention, where, while conversing with a young inventor, notices and is amazed by Hiro's microbots. Following Hiro's presentation, Krei approaches him and offers to buy them, although Robert Callaghan intervenes, claiming that Krei only wants to use science for selfish and greedy reasons. Hiro decides not to take the offer and Krei begins to walk away, although Tadashi catches him trying to walk out with one of the microbots, forcing him to return it. Following Hiro and his friend's escape from Yokai, Hiro shows them an image of a bird inside a circle that he noticed inside the factory where the villain had been manufacturing the microbots, leading to Fred suspecting that Krei could be the one behind the mask, yet the others dismiss this idea.

After forming themselves into a superhero team, Hiro and his friends head off to Akuma Island, as Baymax had detected Yokai's vitals there, where they learn that the island is actually an abandoned lab belonging to Krei, and then find a computer bearing the same bird symbol they had seen before. On the computer, the team discovers a video showing Krei demonstrating portal technology to military officials, although, when testing the portal on a human being, he knowingly overlooked an error that caused the experiment to go horribly wrong. This makes the team believe Krei is Yokai and is using the microbots in an attempt to steal back his research, however, after engaging the villain again and removing his mask, they find that he is really Callaghan, not Krei.

Following Callaghan's escape and Hiro being calmed down by Baymax, the team shows Hiro the rest of the video, which includes Callaghan trying to attack Krei for letting the experiment be performed unsafely. Analyzing the footage even more, they find that this is because the human subject who presumably died in the accident was Callaghan's daughter Abigail, and that he is going to seek revenge on Krei now that he has everything he needs. As predicted, Callaghan attacks during Krei's latest ceremony, outraged at him for seemingly calling his daughter a "setback" before revealing his plan to use Krei's portals to destroy everything precious to him before destroying him as well. The team then arrives and Hiro talks Callaghan down, claiming that Abigail would not want him to do this, although when Krei cowardly tells Callaghan that he'll give him anything he wants, the infuriated Callaghan states that he wants his daughter back before resuming his original plan. Callaghan pins Krei to a wall with his microbots while he deals with the heroes, however, they manage to defeat him instead.

Baymax then detects Abigail's vitals from inside the portal, but while Hiro opts to save her, Krei objects, concerned he won't make it back as the portal is destabilizing. Hiro and Baymax go in anyway, Hiro telling Krei that someone has to help, leaving him and the rest of the team behind while they rescue Abigail, albeit at the cost of Baymax. Krei is later seen talking to the police while Callaghan is being arrested, and opens a showcase hall in honor of Tadashi during the credits.

Big Hero 6: The Series
In "Big Roommates", Krei and his assistant are seen walking into a warehouse, where Krei shows off a prototype neurotransmitter that can control anything it is linked to, based off of the one Hiro made to control his microbots. His assistant calls it out as rip-off, but Krei remarks that it is really a better version, because it is legally different enough that he can't be sued. Krei then proclaims that the completed version of the device will be worth billions before the both of them leave the warehouse. Unknown to the both of them, an unsuccessful thief named Dibs had overheard their conversation and then attempts to steal the device for himself, although it and Honey Lemon's chem-purse end up mutating him into an amorphous monster.

Following his unsuccessful encounter with Big Hero 6, Globby decides to kidnap Krei so that he can learn how to control his powers. After capturing Krei, who is mostly just annoyed that his prototype had been stolen, Globby takes him to the top of a building where he is confronted by Big Hero 6. Enraged, Globby threatens to throw Krei off the building but Honey Lemon manages to calm him down and get him to release Krei. Krei then attempts to use Honey Lemon's anti-sticky ball to force the prototype off of Globby but ends up falling off the roof instead, prompting Globby to save him. After rescuing Krei, Globby reveals that he misinterpreted Honey Lemon's advice and now intends to become a supervillain before swinging away. While Globby is escaping, Krei realizes that he had stole his wallet.

Trivia

 * Krei is the third character in the Disney Animated Canon to be voiced by Alan Tudyk, following Turbo and the Duke of Weselton and predating Duke Weaselton. However, unlike them, Krei is not a villain in his first appearance (despite becoming one in the series).
 * In the first version of the Big Hero 6 script, Krei would've actually been the one to take up the identity of Yokai, as he needed to create a threat to force San Fransokyo's mayor to buy his pioneering defense project and save his company from bankruptcy, also brainwashing Tadashi and Callaghan, who both survived the explosion, into becoming scapegoats for his plan. However, this idea was scrapped because the production team felt Krei being the main antagonist wouldn't have a enough impact on the story.