Cleveland Booker's brother on Kwejian, whose deal with the Emerald Chain drove a wedge between them.
Kyheem was Cleveland Booker's brother on the planet Kwejian. When climate changes after the Burn brought locust swarms that devastated the harvests, he struck a deal with Osyraa's Emerald Chain to protect the planet in exchange for access to Kwejian's trance worms, a decision Book bitterly opposed.
Kyheem later turned against Osyraa with the help of Discovery and the Federation, and the brothers made peace. He and his son Leto were killed when the Dark Matter Anomaly destroyed Kwejian, a loss that haunted Book.