First Look at Harbinger in "Crisis on Infinite Earths"

The CW has confirmed that Lyla Michaels (or some Earth's version thereof) will become Harbinger in Crisis on Infinite Earths. In the comics, Harbinger was a key part of the Crisis storyline and the Monitor's foster daughter. Executive producer Marc Guggenheim commented,

Lyla Michaels as Harbinger is a key component of the original Crisis on Infinite Earths that we were determined to honor in our crossover. What makes this particularly satisfying for us is that we introduced Lyla Michaels and her Harbinger codename all the way back in Arrow Season 1.