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I recently watched Captain Marvel (2019) and the Carol's backstory, at least the one she believes, is that she was wounded in some event she doesn't remember, ended up on Hala, and received a blood tranfusion of Kree blood to keep her alive. (It's implied that this blood transfusion is why she is a match for the Kree physically.) We know at least some part of this is true because Danvers, a human, now clearly has Kree blood. We also know Danvers knows/believes it to be true, based on Yon-Rogg's interrogation of her when checking for Skrulls.

However, there is reason to doubt parts of this story, since we also find out

Yon-Rogg met Danvers on Earth, while chasing Mar-Vell, and that Danvers's powers actually come from the Tesseract.

Was Yon-Rogg lying to Carol/Vers about the blood transfusion? If so, why does she bleed blue Kree blood?

The way I understood it, Carol was infused with the energy from Mar-Vell's engine, but her Kree blood is from Yon-Rogg.

• By the time the engine blows up, Mar-Vell is in no shape to be giving blood transfusions.


• The way the topic of the transfusion comes up means that we have no reason to doubt it, or at least no reason to doubt that that's how Carol remembers it.


• Carol undoubtedly has blue (Kree) blood, yet The Great Intelligence is unable to take away her powers - because said powers don't come from The Great Intelligence. In other words, her powers and her Kree traits have two different sources.

(All of this is based on the movie only - I've never so much as encountered a Captain Marvel comic book.)

Given it was used as a test by Yon-Rogg to determine whether or not it was the real Danvers he was speaking to and the Skrull's inability to answer was enough for Yon-Rogg to shoot the Skrull, he would have to be pretty certain that the real Danvers would know (or at least believe) she had received Yon-Rogg's blood.

Additionally, Mar-Vell's engine was not necessarily anything to do with Kree technology. It was mentioned by a Skrull, iirc Thalos(?) that her powers exhibited the same energy signature as the engine, which would suggest that all the explosion gave her was Tesseract power, something that is unlikely to give Danvers Kree blood since the Tesseract's power pertains to space.