Who is Facet?

Chapter 10 is the tenth issue of Adventures of Supergirl. It was released on May 30, 2016.

Synopsis
Supergirl has met her match in Facet, who sends her back to the D.E.O. with questions: what did Alura have to do with Facet's past-and what is her continuing mission on Earth?

Trivia

 * Facet Jens and one of Kara's classmates from Krypton, Jodelon, were both revealed to be from the planet Barrio II. In the comics, there is only one known native of Barrio II, Chaselon (a.k.a. Alpha Lantern), a sphere shaped crystalline being, who is the Green Lantern of Sector 1416.