The ruler of the Alshain, a winged, butterfly-like people, who meets Michael Burnham and Cleveland Booker in 3190 and takes offence at their offer of dilithium before accepting their help.
Emperor Lee'U appears at the start of Kobayashi Maru. Burnham and Book visit his world as envoys of the rebuilding Federation, bringing dilithium as a gift for a people cut off since the Burn.
The audience sours when the Alshain learn of Grudge, whom Book describes as a queen. They conclude that the visitors hold a monarch captive and mean to do the same to them, and the pair are chased through the forest by flying warriors.
Burnham realises that the Alshain navigate by their planet's magnetic field and that the satellites meant to steady it have run out of power. Discovery repairs them and leaves the dilithium anyway, and Lee'U concedes that the Federation's intentions are good.