Mason Ordrosso

Mason Ordrosso (メイソン オルドロッソMeison Orudorosso), the Chronos Number XII, is a character who vastly differs between the manga and the anime. In the manga, he is mentioned as the sole survivor of the Chronos Numbers who fought in the war against the Tao Masters. He only appears briefly near the end and his name and weapon are never revealed. In the anime, he is revealed to be a traitor to Chronos and the primary antagonist of the Eden Arc.

Appearance
Mason has long, gray, spiked hair with sideburns and a thick mustache with each side as long as his hair. He wore robes while in Chronos, but as a Zero Number, he wore gold armor.

Personality
In the manga, Mason appears duty-bound, observant, and cheerful. In the Anime however, Mason is cold and manipulative, having deceived everyone for over twenty years so that he could complete his plan. He wanted to fuse Eve with Eden in order to recreate Earth with only the finest humans, all of whom would be under the control of the Zero Numbers.

History
Mason is said to be the oldest Chronos Number, and was the only one alive to actually witness the Taoist War. He learned many high-level Tao techniques from their leaders, but stayed in Chronos until present day.

Alliance Arc
After the battle with the Apostles, Mason on the island arrives with Belze Rochefort and witnesses the explosion of the castle from afar. He asks No. II if he is worried about the other Numbers, to which Belze bluntly replies no.

Anime Plot
After the final confrontation with the Apostles of the Stars, Mason and his team of Numbers defect from Chronos and kidnap Eve. Train Heartnet, along with the Apostles and Chronos, follow him in order to save her, and take on Mason's Zero Numbers. Train attempts to fight Mason himself, but is stopped by Creed Diskenth, who tells Train to hurry ahead and find Eve. Mason is destroyed along with his team when Eden is, since they were all connected to it.

Equipment and Abilities
Armor: Mason's Tao is an invincible armor that increases his strength. The full potential of this Armor is obscure, but it seems powerful, seeing as he was able to defeat Train, Belze, and Sephiria with it.

Trivia

 * Mason is the only number to have been a Tao User.
 * He is the oldest of the Numbers.
 * Mason is the only Number who is never shown wielding an Orichalcum weapon.