Fang doesn't understand why people compare Lightning to ice.
Sure, on the outside Lightning is a woman who is callous and cold, a woman who closes herself off from the world. If you were to look at her in the eye, you'd only see your own emotions reflecting from her. Her words can cut deep too, like jagged shards of ice being chucked at you.
However, in the end it's all superficial, like a river that never freezes completely under ice, and flows beneath the sheet of ice. Lightning is far more than that; after all she did learn fire before she learned ice.
Fang can see that all the time, she sees Lightning burning in the back of her eyes. Sure, there are times that it's more visible to her and the others. Those moments where her vicious temper flares up, or the times when her voice gains a desperate tone when she speaks about their focus or Serah those are the moments the others can see and acknowledge. Fang sees it deeper than that, or just perhaps more clearly than any of them. And what she can see-
Lightning's lost, thrown around and battered in a firestorm of her own emotions. She feels everything so strongly that without something to ground herself on… or to, she ends up tossed and thrown about like a ragdoll within her own psyche. Yet she carries on, putting up a front that she has control, to hide it all away, and be that perfect soldier that the Guardian Corps demands of her on a daily basis.
At times, Fang wonders how long Lightning has lived this way, if she's even aware of what's real and what's another wall; another front. Fang isn't the least damaged of the l'Cie by far, but she thinks she may be able to help the soldier. Lightning isn't the talking type, but maybe if Fang can get her to let out some of that fire she has it may help to quiet that storm inside of her.
Maybe then, and only then with the raging inferno in hand, she'd be able to see Light smile. A true, real, genuine smile; not that usually finds its way through her walls that's constrained and calloused, half frozen because of her walls. Fang is convinced the moment she sees that true smile that it would be warm and glowing, and would light up the faces of all the people around her.
And as Fang sits watching the haloed form of Lightning through the tiny flames of the waning campfire she wonders what it would take to get her there.
