TVLine has confirmed that Lyla Michaels, a character who has been played on Arrow over the years by Audrey Marie Anderson, will fill the role pf Harbringer in the Arrowverse‘s next, five-part crossover. Arrowverse executive producer Marc Guggenheim said they explored the idea of a comics-accurate helmet but it
"didn’t look right."
In “Crisis” lore, Lyla was an orphan raised by the Monitor, and as an adult she assisted him in identifying and grooming heroes and villains to team up and hopefully fend off the titular, universe-destroying event. She adopted the name Harbinger after being energized with the power to create doppelgangers.
It is unclear if Arrow‘s own Lyla (as in Diggle’s wife/A.R.G.U.S. boss) will serve as Harbinger, or if it’s another Earth’s version of the character.
The Flash showrunner Eric Wallace told sources,
“When you see who’s playing some of the major characters – like Pariah, who we’ve already announced is Tom Cavanagh — there is a reason why Tom Cavanagh is Pariah. It’s not coincidence, and you need to watch this season of The Flash to understand that."
“Same thing with the person who ends up being Harbinger,” Wallace continued.
“It will make so much sense to you, you will go, ‘How did I not see that coming?'”
“We are trying to pay off as many things as possible,” Wallace said.
“We’re trying to honor some things we hope people will notice and enjoy.”