It might be pretty difficult to out-charm John Diggle, but as far as Arrow and Supergirl executive producer Andrew Kreisberg is concerned, that's exactly what Chyler Leigh's Alex Danvers has done.
Saying that his previous favorite original character -- one who didn't appear in the comics, not one who was merely drastically changed like Felicity Smoak or Maggie Sawyer -- was John Diggle, but that Alex has managed to unseat Oliver's right-hand man.
"I had previously been most proud of Dig. Now, it's definitely Alex," Kreisberg told ComicBook.com. "I think that we're just the lucky guys and girls who get to tell this leg of the characters' journeys. You sort of just hope that you can add to it and add to the collective story that is told over so many decades. The idea, like with Green Arrow, that John Diggle has become part of his universe. Now Diggle is in the comic books not written by us. People have just embraced that character."
And he expects that to happen with Alex, too, considering how much the audience has warmed to her.
"And that future generations of Green Arrow storytellers might have John Diggle as part of his world is just so cool to us," Kreisberg added. "Similarly, with Alex, that Supergirl has never really had a sister before and yet hopefully now people feel like that relationship is almost indispensable to interpretations of her. And I think Alex is one of my favorite characters I've ever gotten to write. I think that what's so interesting about her is that Alex would be the star of her own show, except for the fact that her sister is Supergirl. She's a doctor and an alien fighting secret agent. If she played an instrument, she'd be Buckaroo Banzai. She's this amazing character and she's only overshadowed by the fact that her sister is the Girl of Steel. And I think that's so interesting that she's both her sister's protector, and teacher, and confidant. But then can't do half the things that Kara can do and yet is so resourceful on her own. I just think she's just such an amazingly interesting, complex, and funny, and deep, and emotional. And just the journey that she went through regarding her own sexuality this year. She's never not interesting. There's no situation you can put her in where I don't think she's the most interesting person in the room."
Supergirl airs Monday nights at 8 p.m. ET/PT on The CW.