Carly Carmine, known as Carly Nagisa in the Japanese version, is an unsuccessful, clumsy reporter, who tends to get pushed around by others. In the English version, Carly is not even a real reporter, but an unpaid intern for a newspaper who posts stories about street duels on a blog.
She tries to report real stories for the newspaper, but at first never succeeds. Despite witnessing all the events concerning the Dark Signers, learning many secrets about New Domino City and Satellite and spending time with Jack Atlas, something always prevented her from writing a story.
Carly becomes a Dark Signer with the hummingbird dark mark with messages to kill the Signer Jack Atlas. She fails, but is returned to normal after Goodwin's defeat.
She is disliked and somewhat envied by Mina and later Stephanie, due to the amount of time she spends with Jack. She also develops feelings for him during the time they spend together and is willing to follow him wherever he goes.