Caius Ballad

a character Kaias is an antagonist from Final Fantasy XIII-2. He is said to act as Lightning's rival or foil, and both are depicted on the game's logo.

Appearance
Kaias has long dark purple hair adorned with feathers, and wears a purple bandanna and form-fitting black and purple armor. He wields a large sword which emanates a purple flame and whose handle ends with a hook. It is presumed that he is Chaos Bahamut's master.

Story
In the game's first trailer, Lightning, wearing a suit of armor, is seen kneeling to a crystal throne within a temple of Etro, before crossing swords with Kaias, wields a large sword emanating a purple flame. Toriyama has described Kaias as being of equal strength to Lightning, and being able to fight on even terms with her. He is said to be on a similar mission to Lightning's, and will be in her way as she tries to complete her own. Toriyama has also said that Kaias has a relationship with Lightning as her fated rival, and is somehow also connected to Noel (both know each other by name, at the very least).

Kaias has a female companion named Kuru. She makes a small appearance in the TGS 2011 Trailer with a veil covering her face and telling Noel and Serah that Kaias and she have been watching over them.

Development
Kaias was designed by Yusuke Naora.

Etymology
Kaia means "Pure" in Greek.

Trivia

 * Before his name was revealed, Kaias was nicknamed "Purple Guy."