Jannah

Jannah (formerly known as TZ-1719) was a supporting character introduced in Star Wars: The Rise of Skywalker. Like Finn, Jannah is a former First Order Stormtroopers who lived on the planet Kef Bir after her defection. Upon meeting Finn and his comrades, Jannah and her group of other defected stormtroopers joined the Resistance in their final fight against the First Order and Palpatine.

Trivia

 * Jannah is the second known stormtrooper to defect the First Order in the sequel trilogy; the first being Finn.
 * Jannah is also second known stormtrooper to be a female; the first being Captain Phasma.
 * Jannah is the first supporting female character to be black