As he is immortal and almost invincible, Alucard is very egotistical. He freely taunts and belittles his opponents, often allowing them to inflict seemingly fatal wounds before healing himself and obliterating his enemy. One of his favorite methods is allowing himself to literally be shot to pieces before simply flowing back together. It could accurately be said that rather than killing his opponents, Alucard breaks them. An example can be seen in volume 2 when Alucard fights Luke Valentine. When Luke gains an advantage over Alucard, victory seems within his grasp. The tides turn when Alucard shoots off Luke's legs, telling him to regenerate them and pick up his gun and fight back. When Luke fails to do so, Alucard transforms a part of himself into his hell hound and devours Luke, saying:
"As a vampire you were a pathetic piece of shit, now you are nothing but dog shit."
However, even as an invincible vampire, Alucard can be stunned, usually because of his arrogance. In his first meeting with Alexander Anderson, he assumed he had easily killed Anderson with a single bullet, and was caught off guard when latter regenerated. Alucard also expressed deep disappointment that Luke was not a more worthy adversary, and in both the anime and manga he seems to long to fight a truly equal opponent.
However, underneath his cocky, dark, arrogant attitude, Alucard seems deeply sad and envious of humans, for they are blessed with the gift of death, while he himself is unable to die and must walk the Earth for eternity. Over the course of his existence, Alucard has come to realize that life needs death to make it precious. Alucard chose to become a monster to obtain power and escape death, and he regrets it. All of these feelings are shown at various points throughout the series, such as when Alucard tells the Queen that she is "that same saucy filly from 50 years ago" and that she is "truly beautiful now", when he becomes infuriated as Anderson stabs himself in the heart with the Helena's Nail in volume 8 (because Anderson is making the same mistake that Alucard made), and when Alucard says that Walter's old, aged body was "a trillion times more beautiful" than his new, vampiric body in chapter 74. His desire for a worthy opponent may be connected to his regret, as well; it could be interpreted as a desire to finally die in battle.
Arthur Hellsing explains it the best in chapter 72: "For what they all seem to seek is to wage war, and endless desperate, blood-stained, struggles. Things quite close to crying loudly. I don't think they desire those things at all. On the contrary: all of this is their way of shouting and begging for death."
In conjunction, Alucard also holds a great affinity for humans who take pride in themselves, often expressing his desire of being killed by a human/mortal which would be the ultimate irony and truth. For an immortal vampire to be slain by a mortal human, and of how all monsters are destined to be slain by men. This would explain why Alucard often expresses such joy when facing off against Anderson, who was, up until Volume 8, a human. He often respects certain humans for their bravery, for choosing to remain mortal and accept death rather than choose the cowards way out and become a vampire.
Alucard has expressed extreme disgust with the vampires he's been hunting for the last 100 years, especially when they kill without purpose. In chapter 3 of the manga (Murder Club), he lists the two vampires' pointless killing in his catalog of how pathetic they are. In the original Gonzo anime version (Club M), Alucard makes his discontent apparent:
"You've gone and taken all those lives, and not even because you were thirsty. Is it fun? Is that what it takes for filth like you to get off?"
Despite this, he isn't entirely against immortality. Rather he believes it is a gift that must be earned and that is limited only to certain personalities or perhaps characters of sufficient will, which he may believe he lacks. As such he views suicide as the lowest of human will and a fool's way of escaping, being extremely offended when a GATE officer commits suicide to avoid being brutally killed by Alucard. He happily gave Seras immortality despite his self-reflection due to her indomitable will, courage, and unwavering resolve, even when facing off against the ghouls and the vampire priest. He also viewed Walter in the same regard for a time, even indirectly offering him immortality. It can be said that he believes that Walter "took" immortality rather than "earned" it.
Another important aspect of Alucard's personality is his relationship with God. As a human, he was a crusader, a knight who fought against the Muslim Turks to spread Christianity. As a warrior, he believed that words alone were not enough; that one must accomplish deeds in order to attract God's attention, a belief shared by his rival, Alexander Anderson. In accordance with this belief, he never asked God for favors, but instead did many great and terrible things. He became famous for punishing evildoers in his own lands and abroad, for waging a war against the Muslims in hopes of bringing down "the New Jerusalem," and for sacrificing his troops and his people to achieve his own goals. When he lost his war and was captured by the Turks, he realized that he had failed. Feeling abandoned by God, he abandoned God in turn. In a moment of perfect despair, he drank up the blood of his scorched and besieged homeland and became a vampire.
It's possible that Dracula's plan in England, which began with invasion and probably would've ended in conquest, was a way of avenging himself against God, whom he blamed for his own mistakes (this is similar to how Count Dracula was portrayed in Francis Ford Coppola's film, Bram Stoker's Dracula, which Hirano has cited as one of his greatest sources of inspiration).
Alucard demonstrates, in various incarnations of the series
Hellsing, an astonishing and overwhelming range of supernatural
attacks; these include, but are probably not limited to
SKILLS
- Immortality (which is assumed with how many souls he
has absorbed, though it was merely fan theory that states that, and
never proven and or hinted. It was proven wrong when Anderson attacked
Alucard when all of his souls were released, and he was still able to
regenerate perfectly fine).
- Regeneration: Alucard's ability to regenerate is
considerably greater than any other vampire's, and may be due to the
Hellsing family's experimentation. He has regenerated from a pool of
blood and from being blown to shreds by gunfire, incinerated
completely, etc.
- Incredible Accuracy: Alucard has been known to hit targets at great range using handguns while looking the other way.
- Superhuman Strength: extent is unknown, but Alucard can
physically rip humans apart with ease. He also ripped through Tubalcain
Alhambra's card which was strong enough, and dence enough, to slice
through uranium.
- Superhuman Speed: He can move faster than can be seen,
and is faster than Mach Speed. He caught a magic bullet within his
mouth which tore through an SR-71 ( which is made of multiple alloys,
including VARIOUS amounts of titanium. ) and crushed it within his
teeth.
- Intangibility: The ability to pass through solid objects.
- The ability to defy gravity to an uncertain limit. He is also
seen leaping impossible distances and can go up vertical surfaces.
- Manipulation of shadows into physical form. (Although vampires
controlling shadows isn't unheard of, the artwork sometimes makes it
difficult to distinguish between blood and shadows.)
- Shapeshifting: Alucard can transform himself or parts
of himself into bats, insects, snakes, hellhounds, other human forms
including a little girl, an amorphous mass of darkness, and many other
forms. Alucard can has four known human forms each with different
characteristics and weapons.
- The ability to control the weather to an unknown limit, as
demonstrated by the fog created when he returned to London aboard the
H.M.S Eagle.
- Telekinesis: In the manga, Alucard is seen
telekinetically moving a broken down air-craft carrier from the Gulf of
Italty to the Dover of London all in a little less than 40 minutes,
only travelling at a few knots.
- Telepathy: Alucard can speak telepathically to his fledgling.
- Mind Control and Hypnosis (fans sometimes call it the "sex beam" after a remark from Pip).
- The ability to summon familiars, the souls of those whose
blood he has sucked in a variety of forms that either sprout from his
body or swarm about him as an army numbering in the thousands. These
familiars can also include animals such as horses and the weapons and
abilities that the familiars possessed in life, but Alucard can only
use this ability when control art restriction system level zero is
released.
- The ability to suck a person's blood and absorb their soul
and, consequently, their knowledge and memories. (He learns more about
Millennium after absorbing Tubalcain.) He can also absorb blood through
his clothes and skin, as he does with Luke Valentine's blood after his
hellhound had eaten Luke's body.
- Hibernation: Alucard is able to survive long periods of
time without consuming blood, but is able to fight at a usual level of
strength after drinking blood.
- Immunity to the weaknesses most vampires possess. His
abilities and health are not in any way compromised by such things as
sunlight or silver. In fact, it appears that the only weapons capable
of harming him to any real extent are the most holy of Christian
artifacts, such as Father Anderson after augmenting his abilities with
Helena's Nail ( a nail which was from the True Cross which crucified
Jesus Christ and was blessed in his blood).
- The ability to sense supernatural activity (In The Dawn, a
prequel to Hellsing. Alucard knew the Captain was a werewolf the moment
he saw him, and in the OVA, could see the blessings on Father
Anderson's bayonets).
- In addition to his superhuman abilities, Alucard also possess
centuries of combat experience. While he usually relies on crushing his
opponents with sheer power, he does at times use strategy. When he
fought Alhambra, Alucard used shadow duplicates to distract him,
allowing Alucard to close the distance between them and deliver the
deathblow.
- While regenerating he gains a great immunity to anything that tries attacking him, leaving it non-effective
While not directly confirmed, it appears that Alucard has acquired
Schrodinger's quantum reality manipulation powers after absorbing him
during the Millenium incident. This would grant him the ability to
exist wherever and however he wishes, although it took him 30 years to
be able to use this apparent power due to the complex nature of it.