Alexander Anderson/History

Before the Events of Hellsing
The early history of Alexander Anderson is largely unknown, such as when he joined Iscariot, or what his childhood life was like, and even appeared in Crossfire alongside Enrico Maxwell discussing missions with Heinkel and Yumiko. However, it is sometimes speculated that Kouta Hirano's hentai series Angel Dust, which depicts a younger character named Anderson with whom he shares many similarities, may show some of his past.

Volume 1
Alexander first appears stopping two orphans from fighting each other, then kindly tells them, that it's alright to use violence against heathens and monsters, and after seeing Renaldo approaching him, he tells the two orphans to go back to their rooms, and later, Alexander is convinced by Father Renaldo to travel to Northern Ireland to deal with Alucard and Seras Victoria, who are hunting a vampire. Believing that Northern Ireland is Catholic land and Protestant England has no jurisdiction there, Anderson agrees and travels there.

Alexander arrives there, and Seras, who was on a killing spree of brutally murdering ghouls and just an inch away from drinking blood, was impaled by multiple bayonets, which were blessed and caught Alucard off-guard and as Alucard turns around to see who did this, multiple nails which was placed onto bible pages covers the long, dark hallway and finally, Alexander makes his entrance and confronts Alucard. Alexander smiles widely and claims that the Iscariot are "Agents of God. The instrument of his divine punishment on Earth" and announces the Iscariot's mission; to wipe out every last bit of flesh of those fools who dares to oppose him, he says these lines while preparing his blessed bayonets, which is covered by blood. He then slowly walks towards Alucard while calling both Seras and Alucard, "Hellsing lapdogs" and then, calls Alucard miserable, while Alucard too, starts walking.

Both are ready for a standoff, and finally, Alexander impales Alucard with both of his bayonet, while Alucard took the chance and caught Alexander off-guard. Alucard pulls out his Casull, points it at Alexander forehead, then pulls the trigger. After complimenting Alexander a little, and tries to help Seras. But, Alexander shocks Alucard when he stands up and impales him with 2 bayonets once again, to which, Alucard replies back by leaping in the air and shoots Alexander multiple times with the Casull, which was powerful enough to send him reeling back. Alexander then gets up while grinning, then ran straight towards Alucard. Alexander blocks all bullets from the Casull and throws multiple bayonets at Alucard, which shattered windows. Seeing Alucard distracted, Alexander takes the chance and grabs his hans and stabs it with his bayonets. After Alucard is trapped, Alexander shows his regenerating ability to Alucard. This was when he realizes Alexander is a Human Regenerator. Alexander once again throws multiple bayonets at Alucard's torso before decapitating him and laughs manically and calls Alucard a complete joke.

He turns around, and sees Seras, trying to escape with her master's head. He walks towards Seras, slowly and eventually catches up to Seras and is stopped from killing her by Integra. Anderson states that he will not back down against a "Protestant whore" and swiftly kills Integra's bodyguards. Before he can kill Integra herself, Alucard regenerates himself and engages Anderson. Anderson retreats when he realizes he can't defeat Alucard with his current weapons and teleports away, shouting: "We'll meet again, Hellsing! Next time, I'll butcher you all".

Volume 3
Alucard appears after Maxwell insults Integra, and Maxwell responds by calling Anderson into play. Before they can start another duel, Alucard and Anderson are interrupted by Seras leading a group of elderly Japanese tourists (possibly because of some agreement with Walter that Alucard would not destroy the museum, since the two smiled at each other after everyone had gone). The two decide to postpone their fight. Anderson proceeds to leave, commenting on the quality of the museum and asking Maxwell if next time he could bring some of the orphans to visit. In an almost humorously agitated manner, he then swears that he will rip Alucard to pieces the next time they meet.

Anderson is briefly seen watching the fight between Tubalcain Alhambra and Alucard on television, at first looking amused, but later enraged.

Volume 4
Anderson is sent to deliver a message to Alucard and Seras to return to London and report on the Millennium Organization, which he only does after a brief fistfight with Alucard. Afterwards, he engages in battle with some paramilitaries sympathetic to the Millennium cause.

Volume 6
After The Major declares war on England, Anderson brings the rest of Iscariot with him to England and saves Integra from a group of Nazi vampires. When Heinkel Wolfe attempts to apprehend her, Integra disagrees and asks Anderson if this is permissible, to which Anderson says it is not. He instructs Iscariot to follow Integra's instruction by escorting her back to the Hellsing manor.

Volume 7
Later, Maxwell arrives in England with the remnants of the armies used in the Holy Crusades and takes the opportunity to kill all English "heretics". Seeing this, Anderson believes Enrico has quit serving God and now only serves himself. When Heinkel informs Anderson of Iscariot's new orders to take Integra prisoner, Anderson expresses his displeasure. Before he can act against the rest of Iscariot, Seras arrives with her new powers awakened and does it for him. Anderson acknowledges her newfound power, telling Heinkel (and Yumie in the OVA) that Seras was not something the ordinary members of Iscariot could hope to fight any longer.

Volume 8 and Volume 9
After watching Maxwell's attack on London and Alucard proceeding to decimate the Catholic Army and the Last Battalion with his familiars, Anderson decides that it was finally time for him to finish the vampire. He calmly tells the rest of Iscariot to head towards the Vatican in order to protect the Pope and all of Catholicism in general before wishing them farewell (he knows the fight with Alucard will likely take his life) and teleporting to Alucard and Integra's location. However, when he engages Alucard in combat, Alucard introduces him to the Jackal which Anderson had never encountered before.

Using the Jackal, Alucard blows off a large portion of Anderson's left arm, which does not seem to be able to regenerate itself. Alucard then taunts Anderson, who blindly charges into Alucard's familiars in an attempt to re-engage him. Alucard is impressed with Anderson's spirit, stating how interesting humans and their indemonstrable will are and even compares Anderson to Van Hellsing himself (it seems that Alucard would be proud to die in combat against Anderson). Anderson manages to defeat many of Alucard's familiars by using an explosive and bayonet-lined chain, but he is still overwhelmed.

Trapped in the mesh of undead, Anderson is saved by the remnants of Section XIII. Headed by Heinkel Wolfe and Yumiko Takagi, the Iscariot soldiers use suicide bomber-like tactics to fend off the familiars. Anderson finally arrives before Alucard and reveals the weapon that Vatican Section III Matthew had provided him with: Helena's Nail. Alucard begs Anderson not to become a monster like himself. Anderson doesn't heed the warning and states that he wishes to become a being neither human or demon, but a whirlwind of destruction and piety. After impaling himself with the nail and transforming, Anderson and Alucard do battle, with Anderson nearly being allowed to defeat Alucard with his newly acquired powers. Seras intervenes but is overwhelmed by Anderson's thorns. Alucard wakes up and intervenes to save Seras, thus snapping out of his dream of finally resting in peace. After healing, Alucard dissolves the thorns surrounding him and shatters Anderson's blade. Alucard then charges Anderson and, plunging his hand into Anderson's chest, removes the nail along with Anderson's heart.

This destroys most of Anderson's body in the process. As Anderson dies, he and Alucard exchange words as what remains of him decays and turns to ash. Anderson tells Alucard that although he is about to die, Alucard will forever live on, as he always has throughout the ages. He also has a moment of deep insight into Alucard's state of being, rhetorically asking him if he became a monster so that he would not have to cry. As he dies, Anderson hears the voices of the children from his orphanage playing, implying that he has been accepted into Heaven, and reminds them to say their prayers daily before he finally passes away. Integra bows her head and respectfully places Alucard's sword on the ground in order to form a crossover Anderson's body while Yumie, Heinkel, and Seras all engage in prayer or deep thought for the fallen paladin.

With a final "Amen" (which Alucard repeats with a slight smile on his face, signaling the respect he felt for Anderson), a DE-aged Walter descends from the sky and crushes what's left of Anderson's ashes under his shoe and grinds it into the ground. Walter then insults Anderson by saying "Mourning is not necessary for rubbish". Yumie attempts to avenge this desecration of Anderson's remains but is swiftly cut down by Walter. Later, in Volume 10, during the fight between Alucard and Walter, Alucard taunts his former friend by stating that if Anderson couldn't defeat him then a "brat" like Walter never could. In the epilogue, Heinkel had became a regenerator like Anderson and had succeeded him as the main enforcer with rivalry with Seras resembling their mentors' rivalry.