Fate Averruncus

Fate Averruncus (フェイト・アーウェルンクス, Fate Averruncus) Voiced by: Akira Ishida (Japanese), Chris Patton (English)
The main antagonist's henchman. He first appeared as the last of the three mercenary children helping Chigusa during the Kyoto Arc. He supposedly came to Japan from the Istanbul Magic Association a month prior the school field trip to Kyoto, but was actually hired by Chigusa Amagasaki for her plan. She refers to him as "Newcomer". Fate is an expert in both Western and Eastern magic, is highly skilled in martial arts (noted by Negi to slightly resemble the chinese martial arts he practices), and is stronger and more skilled than Negi, as of the current story arc. He was the one that almost turned everyone at the Kansai Magic Association headquarters into stone, and kidnapped Konoka when Chigusa failed to do so on earlier attempts. His real name is Tertium, which means "the third" in latin. The proof that "Fate Averruncus" is really an alias happened during his showdown with Negi when Nodoka arrived during the fight and used the Comptina Daemonia on him. He disappeared after he and the summoned demon god were defeated by Evangeline. He specializes in water-based, petrification spells and massive stone attacks and can perform Eastern magic such as summoning demons using ofuda.

Later on, Fate appeared outside the gate to the magic world, and, upon entering the magic world by following Negi's group, attacked Negi by piercing him with a stone-spear-like projectile. He and a group of mages (whose identities are unknown, although one of them seems to know Asuna) then engage in battle with Negi's ministras, separating the group with a forceful transportation spell, and accomplished the mission they were originally sent to do: destroying the gateway to the normal world (the group later set out to destroy the other gate keys). Fate and his group later framed Negi's team for this, putting a bounty on each of the Ala Alba members, making it harder for them to move freely. It is noted by Evangeline that Fate may not be human (saying he was something more akin to a puppet) and Jack Rakan believes that Fate is a survivor of a supposed doomsday cult that Nagi and his companions battled years ago. Fate and his group's intentions are not fully known at this time, but he claims that he is going to save the world, though he implies destroying it. It has been revealed that he has Pactio contracts with five female mages named Shirabe, Homura, Shiori, Koyomi and Tamaki (their names are most likely aliases, as Nodoka was able to find out Shirabe's real name in order to read her mind).

During the World Peace Festival, Fate shows up in the middle of a street in Ostia, confronting Negi with a deal; Fate would safely escort Negi and his friends to the gate portal in Ostia, in return that Asuna stay with him. Knowing that Fate plans to use Asuna's anti-magic ability to bring about mass destruction, Negi refuses angrily and attacks him in the street. Fate says that he knew that Negi would refuse and tells him "Plan B": To ask that Negi and his friends simply ignore what he is doing since his plan is to bring the destruction of Mundus Magicus (the Magic World). Which, if Negi agrees, Fate will escort him and his companions back to the Old World. It turns out Fate never meant to target Negi and his companions during the gate attack - they were just at the wrong place at the wrong time. Elsewhere during this conversation, Fate's pactio partners attack Negi's companions in an effort to prevent them from interfering with Fate's offer to Negi. Negi eventually refuses Fate's offer, so Fate officially declares Negi his nemesis. A fight begins between the two in the middle of the crowded street; and to Fate's surprise Negi easily punches Fate's stomach. Still, Fate seems to be more powerful and Negi can`t defeat him that easily. During the fight when Nodoka and Kotarou arrive they learned Fate's real name is Tertium. Fate eventually makes his get away after Asuna and Rakan arrive on the scene. According to what Negi manages to read in Nodoka's petrified diary it says that ten years ago, he and Nagi defeated one another.

Source: Wikipedia