<P> The homunculi were created by or are at the discretion of Father, each being a manifestation of one of his traits: his greed, his lust, and so on . Father would later reveal that he ultimately created the homunculi for the sole attempt of purifying himself of what he believed to be his personal flaws . As a psychological effect of their unusual physical prowesses, many homunculi tend to be proud, and exalt their nature as a homuculus . Each homunculus has a Philosopher's Stone somewhere in his or her body which fuels their regenerative ability . At least five of the Homunculi are either natural humans or artificial human bodies who were injected with Philosopher's Stones, which were broken off from Father's body . Wrath and the second Greed are based on natural people and are the only homunculi to not be created from scratch . The only way to kill a homunculus is by expending all of the power in their respective Philosopher's Stone, leaving them unable to revive themselves once they have been killed . Homunculi generally do not age and have long lifespans, but their Philosopher's Stones power will eventually run out in time, meaning homunculi are not eternal . </P> <P> In the first anime, homunculi are the result of a human transmutation, and closely resemble the deceased human intended to be revived . These homunculi are led by Dante, and feed on incomplete Philosopher's Stones to fuel their powers; they are susceptible to death once these stones are regurgitated . The homunculi of the first anime possess an additional weakness: a remnant of their original bodies (a bone, hair, etc .), which weaken and immobilize them when they come in contact with them . </P> <P> "Father" (お 父様, Otō - sama) is the creator of all homunculi using flawed aspects of his personality, and is the series' central antagonist . He was originally known as "The Dwarf in the Flask" (フラスコ の 中 の 小 人, Furasuko no Naka no Kobito) or "Homunculus" (ホムンクルス, Homunkurusu), a shadowy, charismatic creature created eight centuries ago in Cselkcess (クセルクセス, Kuserukusesu, "Xerxes" in the English anime) under the commission of its king to obtain infinite knowledge . Confined within a flask where it can thrive, Homunculus formed an attachment to the young slave boy whose blood had been used in his creation, naming the lad Van Hohenheim, educating him and enabling him to rise up the social hierarchy . However, Homunculus grew envious of the human race, jealous of their mutual emotional support for each other whilst he grew lonely, being the only one of his kind . This envy caused Homunculus to lose sight of his own gifts and talents, eventually losing much of his self - confidence, and as he disliked this low self - esteem of his, he filled himself up with hubris . Playing on the vain King's desire to become immortal, Homunculus tricked the king into creating a country - wide transmutation circle for the creation of a Philosopher's Stone, whose necessary ingredient is the souls of several living human beings . Once activated, Homunculus ensured that he and the unaware Hohenheim were in the center, absorbing the souls of the population from Cselkcess between them . During the process, Homunculus used Hohenheim's blood within him to create a humanoid husk body to serve as his mobile vessel before parting ways . </P> <P> After searching for the nearest area closest to the "center of the world", Homunculus, now sullen and driven by pride and greed, gathered the people living there and founded Amestris under the title of "The Eastern Sage" and taught alchemy to its people for the sake of his master plan: engineering every war in the country's history to bring it into the form of a perfect circle with sites of bloody carnage at all the cardinal points--the necessary configuration for the transmutation of another Philosopher's Stone and repeat his actions in Cselkcess on a higher scale to open the Gate and become a "perfect being" with absolute freedom . Father then attempted to purge out his cardinal sins, thinking that removing his basic emotions would make him perfectly good, and thus superior to humans and close with God . In order to satisfy his desire to have a family like that of humans, Father incarnates these very same emotions into homunculi . Father then uses his homunculi to gather "sacrifices", alchemists of notable skill who attempted human transmutation and survived and gained knowledge of the "Truth"; these' sacrifices' ' are necessary for Father's plan to work . As an additional precaution against alchemists, Father stationed himself underground above the tectonic plates so that he can negate any form of alchemy that derives its power from tectonic energy . Having left the eyes of the Amestrian public, he keeps in touch with the country's highest ranking human officials in order to keep the country's growth under his absolute authority and control . </P>

Who is the father in fullmetal alchemist brotherhood