Early Background[]
Alexander grew up in Russia and at some time entered the army and managed to become a colonel. During this time, he took Boris Ivanov as his disciple, and Boris enlisted himself into the army, becoming a member of his unit. Later, he entered Yami and became one of the Nine fists. During this time, Alexander began a number of unidentified crimes within the military. These crimes became unknown to the Russian Military until years later by several anti-Yami factions. Like all of the other members of the One Shadow Nine Fists, Alexander participated in the joint training of Sho Kano as the sole successor of Yami.
Plot[]
Yomi Introduction Arc[]
His disciple, Boris, draws with Kenichi in their duel in the Ryōzanpaku dojo. When Ogata meets to speak with Alexander about this on his submarine, he flies into a rage over Boris' manipulation into attacking Ryōzanpaku. He was later seen meeting the other One Shadow Nine Fists to discuss who will lead YOMI and who will fight Kenichi next.
Yomi in School Arc[]
Alexander fighting Akisame.
First seen participating in a meeting of important people in Russia. At that time, he managed to get past the security search since he didn't carry any weapons and when he entered, he heard someone mocking Yami, since they are believed to be weak for not using weapons and just a rumor. He quickly got around that person and when his guards pulled out their guns ready to shoot him, he quickly switched to his raging form and took out all 49 people at the meeting in an instant. He later jumped out the window and asked Boris for some tissues. He later left to kill off a congresswomen and managed to find her in her hotel room and escape through the window with her as a hostage. He later met Akisame at a construction site, and they both demonstrated their martial arts and art sculpting skills. He deflected numerous iron cables while, at the same time, he managed to make an angel with the rods in an instant and then threw his creation at Akisame, only to have it reformed into a throwing a statue to catch him. He quickly switched into his rage mode and threw a number of fierce attacks at Akisame but only managed to land a single attack. Later, he tried to attack again but quickly fell onto Akisame's Koetsuji willow leaf walk. Realizing that he can't match Akisame's speed, he decides to retreat but not before throwing the congresswoman over the side, though he failed, as Kenichi dived to save her, and Sakaki managed to save both of them.
He reappears at his Russian base with his soldiers all in formation. At the time, he was talking with one of his higher ranking officers and became irritated at the fact that, because of his raging personality, entire squads of soldiers had to be sent to his base to keep him in check. He is tricked by Akisame into spilling his connections with Yami and engages in a second battle with the Jujitsu master.
Alexander learned Akisame Kōetsuji's Yanagi Ayurashi after witnessing it from their first battle, which Akisame said was impressive for a master of Yami. He is finally defeated by Akisame in Battle 304 when Akisame used a strangling move to counter his "March of Death" suicide technique, knocking him out for 2 seconds. Alexander surrenders to the authorities and proceeds to disown Boris as his disciple and orders him not to try and find him (in that order, making Boris ignore the second order). Just before he was taken into custody, Alexander ominously issued a warning to all who were present that they "shouldn't think it's over just like that". It is unknown at this time what he meant by this warning, but is implied to refer to the Eternal Setting Sun. He is currently being held in Big Lock. His defeat and incarceration make him the first of the One Shadow Nine Fists to be taken out in the ensuing battle between Yami and Ryozanpaku.
The Eternal Sunset Arc[]
After the battle between the Shinpaku Alliance and Yomi at the amusement park and the fight between Ogata Isshinsai and Tsutomu Tanaka ended, Alexander is seen inside of Big Lock alongside Diego Carlo, with Alexander making another one of his works of art. It is then revealed that both of them can escape from Big Lock anytime they want, and that they are willingly staying there because they lost to Ryozanpaku and that their pride as martial artists makes them bound to the winners' orders. They also stated that they will get out of Big Lock only when there is a good enough reason for them to leave, to which the Yami weapon user told them that the Hachiou Executioner Blade team is gathering again, a statement which intrigues them both. After hearing this, the weapon user stated that the One Shadow wanted them to know this and told them to think carefully about their decision. He is next seen still inside of Big Lock, where it is revealed that both he and Diego have been sneaking out of the prison to buy various items (some of which were very expensive on Alexander's part), and then continuously returning there. Diego begins to talk to him about how his disciple, Boris, was able to find the location of Big Lock and wait for his master's return, then begins to talk about his own disciple, Rachel, to which Alexander mockingly asks Diego if he was homesick. Alexander then begins to go on about how he's getting tired of his little "vacation" and says that it wouldn't be bad to go outside again to see the beginning of the Eternal Setting Sun.
During the Eternal Sunset with Yami and Ryozanpaku, Diego and Alexander escape from Big Lock. As the battleships prepare to head out, a soldier reports seeing shadows in the water as three of their battleships are sunk. A submarine surfaces with Diego Carlo and Alexander Gaidar inside, who have been guided there thanks to Boris. Both masters arrive to fight along with Ryozanpaku: Diego asks his disciple where he can stand out the most and Alexander wishes to maintain the honor his death match with Akisame and stop Yami's "inelegant" methods.
Fighters arrive to engage the two masters and Diego asks Alexander why he is fighting against Yami and he answers that if there is no beauty in the Eternal Setting Sun then it must be stopped, as he charges in and mows down a group of soldiers.
Once the Eternal Sunset is lost, Alexander celebrates with Diego.
Epilogue[]
In the Epilogue, Alexander returns to his country, and is now apparently pardoned of his crimes due to his participation in stopping the Eternal Sunset. He is there to witness Boris be awarded his medal and stated how proud he is of his disciple.