Ren Kimura was a 21-year-old Japanese-American dancer when exposed to the Terrigen Mists, which transformed the skin on her hands and forearms into metallic razors, and the ability to produce razor-sharp metal ribbons from her fingertips. With a background in a variety of dancing styles, she'd be a different character to others we've met, and could even blend those into her fighting ability for the show, while her powers would certainly work as well, and the likes of Deathlock and Crusher Creel have shown that they could pull off the change to her flesh. In the comics she's a part of the Fearless Defenders, and if she's introduced on the show she could later join the Defenders that Netflix is building up to, hopefully opening the door for crossovers between their TV series (despite the different networks), given that it's all supposed to be connected, and how successful DC have been in doing that with Arrow and The Flash.