Julian Albert
With Caitlin Snow struggling to contain her “killer” instinct, Julian is a broken man. He’s already done a couple of questionable things in the aid of trying to help her, so it wouldn’t surprise us if he crossed other boundaries in the future.
What if Julian decides to, ahem, stumble upon some super-speed powers, in an effort to get closer to Caitlin? He’s shown that he possesses the intellect to do something like this, and it’s an entirely plausible concept on this show, so we wouldn’t write off this possibility at the moment.
Unfortunately, Julian isn’t a really likeable fella, so even if he did become the hero, the chances are it would have to be for an episode or two at the most. It’s not like any of us are begging to see more of him, especially when there are far more interesting characters around. He’s a real gloomy Gus and unlikely to change his attitude anytime soon.