It's not unusual for a hero-villain pair to essentially be reflections of each other. It helps forge a link between them, even if it's only visual. This is no different with Caius and Lightning, two warriors who have always been described as "rivals" instead of "enemies" by official materials. At least, I've not come across a single piece of official material that has referred to them as anything else. But their mirrors go deeper than just aesthetics.

Caius is willing to destroy the timeline to save the young girl he loves.
He defied tradition to try and save Yeul.
He is passionate, reckless, and hardheaded.
His palette is purple and black, common companion colors to pink and white, respectively.
He wields a large black greatsword.
He occasionally displays tender tendencies toward Yeul, but no one else.
He has been involuntarily infused with Etro's power.
His Eidolon, Bahamut, flies.
He was born and raised on Pulse, the enemy of Cocoon.
The girl Yeul constitutes his sole purpose in life: to protect and care for her.
His hair falls on the right side of his face.
He has dark purple eyes, bronze skin, and is male.
He used his power to manipulate the timeline to his own ends in grief and desperation.
He is likely between 6'4 and 6'7.

Lightning was willing to destroy Cocoon to save everyone from their fate.
She defied the world to try and save her sister Serah.
She is volatile and hardheaded.
Her palette is pink and white, common companion colors to purple and black, respectively.
She wields a slender silver gunblade.
She displays tender tendencies toward Serah, but no one else.
She has been somewhat involuntarily infused with Etro's power, and now Bhunivelze's.
Her Eidolon, Odin, is ground-bound.
She was born and raised on Cocoon, the enemy of Pulse.
Her sister Serah constitutes her true purpose in life: to protect and care for her.
Her hair falls on the left side of her face.
She has pale blue eyes, pale skin, and is female.
She used her power to try and protect the timeline in grief and determination.
She is likely between 5'7 and 5'10.

Obviously, none of these were flukes. How could they be, really?

They are like an embodiment of the idea of yin and yang, being opposites but containing within themselves pieces of each other, though they would never gladly admit it. One male, one female. They are like the earth and sky, fire and ice.

So the question is, if he reappears in Lightning Returns, should they be enemies vying for their own visions of how the new world should play out? Should they be grudging allies, even if it's only temporary? Should they be forced to work together throughout the story? Or should they become more, provided it 1) isn't forced, 2) doesn't move too fast, or even 3) serves a purpose to further their characters?

If you didn't like this pairing, then why are you here? :iconbig--smileplz: