This article contains spoilers for Halo episode 2.
Paramount+'s Halo TV series has introduced Makee, a human who lives among the Covenant - and the show's explanation for the character is great. Halo showrunner Steven Kane caused controversy when he claimed Halo's writers didn't look at the classic game, which is certainly not true; what he seems to have meant is that the writers and producers looked beyond the games, to a wider Halo franchise established in other mediums. The show is actually surprisingly accurate to its source material.
There is, however, one notable exception; the character of Makee, a human who lives among the Covenant. First glimpsed in trailers, she immediately led to intense speculation and debate. In an interview with Decider, Kane revealed she's destined to play an important role in the narrative, her arc paralleling that of the Master Chief himself. "John is in many ways an alien or an orphan among his own people," Kane pointed out, "because he’s different. He’s a Spartan, he’s trained to be a certain kind of way. And that’s what makes them effective as a soldier. In many ways, he is similar to Makee, who is a stranger in a strange land living among the aliens." It's an interesting approach - and, surprisingly, it's actually quite well explained.
As in the original games, the Prophets of the alien Covenant invading the galaxy revere an ancient race they call the Forerunners. They seek out technology created by the Forerunners, hoping it will lead them to the Halo Rings they believe will allow them to ascend to a higher plane of existence. The core problem, however, is that no Covenant races possess the correct genetic code to activate Forerunner technology. In contrast, there are humans who possess the Forerunner gene - an apparent minority called "Blessed Ones." Presumably the Covenant learned how to identify a Blessed One, and took one, indoctrinating Makee into their ways.
The explanation for Makee's presence among the Covenant is a smart one, fitting well with the franchise's wider lore. Frankly, it's actually a logical development of the lore; the Covenant cannot use Forerunner technology, and so they seek out humans who can. It adds another twist to the story, complicating it because in the so-called "Silver Timeline" the Covenant's mission isn't simply genocide. They need to identify humans with the Forerunner gene, who can then be absorbed into the Covenant as Blessed Ones.
In the games, any human being can use Forerunner technology. But that only appears to be true of a minority in the Halo TV series, with only two known to date - Makee and the Master Chief. They are a precious commodity, not to be wasted or put at risk, but ironically the Covenant's Prophets may have no choice. The UNSC possess an ancient Forerunner artifact that may be the key to locating a Halo Ring, and the Covenant need an agent to infiltrate their enemies and discover its location. As the only human in the Covenant, Makee is the only candidate for the mission - ensuring she will cross the path of the Master Chief as Halo continues.