- "A mysterious man with an ominous presence clashes with Lightning, and later Noel and Serah. Caius makes for an intimidating sight as he bears down upon his enemies, brandishing his massive blade with ease. His icy exterior makes it impossible for others to read him, let alone approach him."
- — Official Description
Caius, like Noel Kreiss, is from the future and is a former friend and mentor of Noel's. Due to his position of an timeline guardian, he carries out an all-out war against those who alter the time-space continuum.