They're called Metas. People who on the outside are just like you or me, but on the inside they are something else entirely. Metas are born with something special, something extraordinary; a change in their genetics allows them to manifest powers, strange and supernatural abilities that very widely and rarely clear at first glance. These Metas, or more frequently called mutants, a racially derogatory term used to identify them, are near second class citizens if they are found out. While the law has not yet caught up to the times, it is clear that the overwhelming majority of people can't cope with the reality of these mutants; young children are bullied and often so stigmatized that they are unable to live normal lives, often abandon by their parents because of the knowledge of what they are. Adults who are found out are ostracized, politely denied jobs and sometimes even hunted - of course none of this is technically legal, but the system has a knack for turning a blind eye to cases involving the Metas. To that end most Metas go to extreme lengths to protect their identities and ensure that no one ever realizes what they really are.
Among the Metas there are classes of power, some abilities are minor while others are frankly mindbogglingly major and no two Metas are exactly alike, no mater how similar there powers might seem. Among this wide and varied group are two particular Metas, coded Fire and Ice by outside officials. These two women were born with incredible gifts that while both very basic are extremely potent, cores. The cores are naturally occurring augmentations to the changes that Metas already experience, in essence they are a mutation of a mutation; only about two percent of all Metas develop these cores. Cores serve as fuel for incredible ranges of power, but they come at heavy costs because they are volatile and not completely understood. Having a core is a struggle of balance, tapping into it allows an individual to far exceed the normal limits of what Metas can normally accomplish, but at the same time using those powers threatens to destabilize the core which can often have devastating results, not only to the Meta in question but also potentially everything around them.
Code name Fire possess the core known as Inferno. In many ways the woman resembles her classification; strong willed, fierce temper, impulsive, hot headed and very much a shoot first and ask questions later kind of lady, she has struggled for her entire life to control the volatility of Inferno. Her power has shown is nature in the past, leaving ruin and ash behind. For Fire it's a constant struggle to keep the raging flame at bay and not lose control. She is a dominant soul who can't stand losing that control, she is spontaneous and prone to rapid mood changes that make her as unpredictable as the flames she commands. Always she must be wary that she not allow her emotions to get the best of her however, less she allow one to overtake her and upset the balance of Inferno, a situation that would again result in mass destruction. Her powers are a gift to be used, as she sees them, they are her toy and though she has to be wary of the consequences she rarely turns up an opportunity to show them off to gain an advantage because of them.
Conversely the core called Frozen is gifted to code-name Ice. In stark contrast to Fire, like their two elements, Ice is very structured and reserved. She's been an introvert her entire life who does battle with things like self doubt and feelings of constant inadequacy. Brilliant and very analytically minded, Ice is slow to act but her actions are decisive and meaningful. Frozen has its own risks though, as Ice does battle with bouts of depression, caused no doubt by being cast out by those around her because of what she is, she must keep a constant eye on the frigid feelings within her that make Frozen act up. Her fears, anxiety, concerns and other such powerful negative emotions threaten to grow the ice of Frozen within her and consume her entirely, freezing her in that moment for eternity. Despite all of that however, Ice has a spot for seeing the best in people even after what she has been subject too. She believes full heartedly that regular people and Metas can live together without the distress, without the fear. She has made it a point, her personal goal, to use her power to stop those Metas that might abuse theirs, and ultimately prove to the masses that the Metas can help, they can be trusted, they can be accepted.
Luckily for these two ladies they need not suffer their burdens alone. Unbeknownst to either of them, their fates are intertwined by the gifts that they care as each of their cores is seemingly designed to compensate and quell the other in moments of complete unbalance. Only through each other can they realize their full potential and push one another to heights neither of them ever believed possible alone.
Notes: I'm open to playing either of the two available characters, Fire or Ice. The details about them are easily alterable, for instance there is no reason that Ice must be the naturally submissive recluse and Fire need be the steely dominant one; however the clash of opposites is something I want to prefer. Opposing powers, opposing outlooks, opposing goals, opposing hair color, etc etc. This is a story about two opposing forces that come together and are utterly bound to one another while being as different as you can be - the details of those differences can change freely but the flavor of it should be maintained. I'm also not interested in turning this into anything aside from FxF. Aside from that this is open to a multitude of kinks and naturally leans towards a D/s style, even if not official.