As reported by Mashable, Lightfoot revealed Karen Page wasn’t initially planned to appear in The Punisher series, but he asked to be able to write her into the spinoff because of Karen and Frank’s chemistry in Daredevil season 2.
Netflix’s The Punisher spinoff series didn’t originally include Karen Page, but showrunner Steve Lightfoot asked Marvel to write her into the show.
Of course, Karen Page was instrumental to Frank Castle’s storyline in Daredevil season 2, as she conducted a great deal of research into his past after discovering him as the man behind The Punisher moniker.
Shortly after The Punisher began filming in the fall of last year, it was confirmed Daredevil’s Deborah Ann Woll will appear as Karen Page.