From Halopedia, the Halo wiki
Quan Ah was a shrewd, audacious girl from the Outer Colonies who lived during the Human-Covenant War. At the age of sixteen she met the Spartan-II John-117, a meeting which came at a fateful time for them both.
Behind the scenes
Quan Ah's existence was first unveiled by Showtime on April 17, 2019. In the television series the network is airing she will be played by Korean-Australian actress Yerin Ha. Ha was discovered during a worldwide casting search and is known for her stage work in Australia. Casting notices for the show obtained by The Hollywood Reporter and publicized on November 1, 2018 had mentioned a character named Jenny who was reportedly to be played by a woman of Asian descent between the ages of eighteen and twenty years old. The possibility exists that "Jenny" was a code name or working name for Quan Ah. Additionally, a press release put out by Showtime on August 2, 2019 named the character as "Kwan Ha" rather than Quan Ah. "Quan" and "Kwan" are both variations of the same Chinese surname.
List of appearances