The last of the three mercenary children helping Chigusa. 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.
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. The name he has may not be his real name, as noted by Eishun and further stated by Professor Akashi's report. He disappeared after he and the summoned demon god were defeated by Evangeline. He specializes in water-based and petrification spells and can perform Eastern magic such as summoning demons using ofuda.
(Source: UQ Holder Wikia)