Alexei was the Commandant of the Imperial Knights, the army of the Empire of Zaphias in the world of Terca Lumireis. A formidable fighter who earned his entry to the Knights by winning a tournament, he became a symbol of the organization, representing everything its members were to aspire to be. So strong was this admiration that his personal brigade, the Royal Guard, quickly became loyal to him and to him alone. Over time, he grew weary of the world's injustices and the excesses of the powerful, and became increasingly obsessed with changing it by any means necessary. Delving into the study of blastia, he found ways to unnaturally prolong life even after death, and discovered the location of the Shrine of Zaude; an ancient ruin beneath the sea that, according to his research, commanded a weapon capable of fulfilling his plans. Through manipulation of corrupt officials and the brainwashing of the Imperial Princess for access to her innate powers, he unlocked the Shrine, raising it out of the sea, but lost the trust of the Empire and its people in the process. Finally, his nemeses caught up with him in Zaude, and after a hard fought battle and the Shrine's activation, he was exposed to the reality that the Shrine was not a weapon, but a barrier meant to hold back something capable of devouring the world itself. He had little time to regret all that he had done, however, as the great crystal that formed the focal point of the shield, now disabled, fell down and crushed him.
Alexei was a formidable swordsman, and had access to a number of powerful Artes; magical skills enabled by the use of a bodhi blastia, as well as basic melee attacks and the casting of magical spheres as projectiles. The most basic include Apocalypse Toll (A melee strike that leaves an explosive rune on the target), and Guardian Frost (a casing of ice that protects Alexei for three seconds, also creating a healing effect on him while the ice lasts). The most powerful of his Artes, Brilliant Cataclysm, is only usable when he has access to the Overlimit, but is truly devastating, causing magical bursts in an area around his sword, the False Dein Nomos.
Further details:
Alexei Dinoia - Artes