Everyone loves a badass villain and there's just something about a bad girl we all like. Chesire would easily become a fan favourite on the show. She's well trained in guerrilla fighting and uses poisons to defeat her enemy. The interesting part however, involves Roy Harper. He's sent to turn her over but they fall in love and he walks out, knowing he can't change her. Before this, they had a child. After this, she saved Deathstroke's life and blew up an entire Middle Eastern country, hoping that would impress the Western states. Obviously it didn't and her actions made her a pretty big villain. The storyline from the comics involving Roy Harper is extremely interesting. Roy is going to become a big character in Arrow and is currently working towards that goal. Due to the way he's introduced there would have to be some adaptions to the story involving him and Chesire but they could still have some sort of connection. The connection with Deathstroke could also be exploited. I'll admit, I'm a bit short of ideas on how to involve Chesire but all I know is that I want to see her in the show. I'll leave the details to the writers, they've done a superb job so far so I trust them with this.