Filius Zect
A member of the Ala Rubra. Very little is still known about him; he appears as a calm, collected, sarcastic and extremely skilled warrior excelling in unarmed combat and counter magic. Interestingly enough, Nagi refers to him as "master" despite being apparently older and more powerful. He fought alongside Nagi against the Mage of the Beginning, the Supreme Ruler of Cosmo Entelecheia and was never seen or heard of after. In the most recents flashbacks, he is seen talking to Nagi right after they defeated the Mage of the Beginning. He reveals that he lived for 2600 years, which he describes as "2600" years of torment." He tells Nagi to ask himself if the world is really worth putting his life to risk, he then says that mankind is beyond salvation but that his torments finally ended before vanishing into dust. His mysterious death right after the death of the Mage of the Beginning's and his last words quite similar to the Mage's own speech to Nagi suggests a link of some sort between the two. Many fans believe him to be linked with Fate Averruncus since it is unknown of his fate after the final battle (and before the battle) and that from the video Rakan shows it seems that one of the enemies recognized him which may leads that they have met before. He also has a resemblance with one of Fate's companions (the young, little and mystical black mage who seems powerful with barrier magic, the same magic Filius Zect sems to be extremely skilled at). But it is unknown if he is a traitor or not. (Source: Wikipedia)