Trigun

Vash the Stampede is a wanted man with a habit of turning entire towns into rubble. The price on his head is a fortune, and his path of destruction reaches across the arid wastelands of a desert planet. Unfortunately, most encounters with the spiky-haired gunslinger don't end well for the bounty hunters who catch up with him; someone almost always gets hurt - and it's never Vash. Oddly enough, for such an infamous fugitive, there's no proof that he's ever taken a life. In fact, he's a pacifist with a doughnut obsession who's more doofus than desperado. There's a whole lot more to him than his reputation lets on - Vash the Stampede definitely ain't your typical outlaw. (Source: Funimation)

Vampire Hunter D: Bloodlust

The story revolves around D, the infamous "dunpeal" (born of a vampire father and a human mother) outcast and renowned vampire hunter. His prowess at hunting the creatures of the night allowing his acceptance among humans, he is called upon to locate Charlotte Elbourne, the lovely daughter of an affluent family who has been mysteriously kidnapped. When the sun sets, the hunt goes on! Charlotte`s father offers a rich bounty, be she dead or alive, a task D willingly accepts, even with notorious Markus brothers and their gang of bounty hunters seeking the prize as well. Amidst the chase and unknown to all lurks a sinister evil which has been secretly manipulating their every move and has set a chilling trap that none will expect and few will survive. With the tables turned and the secrets revealed, the hunters could quickly become the hunted! (Source: AniDB)

Hellsing Ultimate

Hellsing, a secret organization of the British government, has long been battling supernatural threats to keep the people safe from creatures of the night. The current leader, Integra Wingates Hellsing controls her own personal army to eliminate the undead beings, but even her highly trained soldiers pale in comparison to her most trusted vampire exterminator, a man by the name of Alucard, who is actually a powerful vampire himself. Along with Integra's mysterious butler and Alucard's new vampire minion, Seras Victoria, The Hellsing Organization must face not only regular ghouls and vampires, but a rivaling secret organization from the Vatican, and Millennium, an enigmatic group of madmen spawned by a certain war over 50 years ago... A bloody battle between monsters is about to begin, the dead are dancing, and all hell is singing...

D.Gray-man

Towards the end of the 19th century, Allen Walker officially joins the organization of Exorcists that destroy the beings known as Akuma; mechanic weapons made by the Millennium Earl with the suffering souls of the dead. Allen has both a cursed eye and an anti-Akuma weapon as an arm, bearing the power of "Innocence", a gift given to him as an apostle of God. Allen, along with his fellow Exorcists must put a stop to the Millennium Earl's ultimate plot that could lead to the destruction of the world and all who live on it.

Witch Hunter ROBIN

Robin Sena is a powerful craft user drafted into the STNJ - a group of specialized hunters that fight deadly beings known as Witches. Though her fire power is great, she’s got a lot to learn about her powers and working with her cool and aloof partner, Amon. But the truth about the Witches and herself will leave Robin on an entirely new path that she never expected! (Source: Funimation)

Fullmetal Alchemist

The rules of alchemy state that to gain something, one must lose something of equal value. Alchemy is the process of taking apart and reconstructing an object into a different entity, with the rules of alchemy to govern this procedure. However, there exists an object that can bring any alchemist above these rules, the object known as the Philosopher's Stone. The young Edward Elric is a particularly talented alchemist who through an accident years back lost his younger brother Alphonse and one of his legs. Sacrificing one of his arms as well, he used alchemy to bind his brother's soul to a suit of armor. This lead to the beginning of their journey to restore their bodies, in search for the legendary Philosopher's Stone. Note: Episodes 11, 12 and 37 were adapted from the light novel "Fullmetal Alchemist: The Land of Sand."</i>