Acnologia: Hogwarts AU
Acnologia was a Pureblood wizard that was born in 1561 and started attending Hogwarts on the 1st of September 1572, being sorted into Slytherin House.
He had a Redwood wand with a Dragon Heartstring core.
His Patronus was a Hebridean Black (same as his Animagus form).
His favorite subject was Defense Against the Dark Arts and Care of Magical Creatures.
Four hundred years ago, Acnologia was a ruthless, bloodthirsty, and violent person. He killed any and all Dragons he could, ignoring the fact that many were raised in captivity and had never killed anyone.
In the present, Acnologia is a recluse who wants nothing to do with humans, in spite of the fact that he is one . As Zeref Dragneel puts it, he sees other humans as nothing more than insects, ignoring any and all attempts by them to converse, which suggests that Acnologia is highly arrogant. However, inversely, Acnologia's motives are also shrouded in mystery, as even with one arm he, according to Zeref, has the power to rule the world yet elects not to do so. Insights into his wishes have only been touched upon by outside sources, which include his vague desire to fight against humanity, as well as face an opponent strong enough to give him a real challenge. Ultimately, in a form of irony, despite his inherent hatred for humanity, Acnologia prefers to take on the shape of his human form in casual instances.
While in his Dragon form he has shown to be very destructive and violent as described before in legend, in his human form, Acnologia retains a stoic and composed personality, even after striking down God Serena, Acnologia still maintained his stoic composure. However Acnologia possesses a love for dueling, as Zeref theorized he was looking for a worthy challenge and let out a smile after Zeref promised him he will soon have a worthy fight. When Acnologia comes across strong opponents, he shows a more excited side to himself, such as during his fight with Irene Belserion he smiled with excitement and anticipation after witnessing the power of the powerful witch, even giving her praise.