Ability and Name hes/hers name: Ability - Fear, Blood.
Call: Supongamos que la aparente (Assume the Seeming)
Special Attacks: Spilled blood is a weapon, thanks to the ability to change his appearance to someone whose blood he touches. When he looks right at someone, they get a fearful feeling. He can amplify this by focusing on them, to a point similar to Ichigo first facing Kenpachi down.
Abilities: Has the power to scare people to death if they are weak enough with his other power, and a terrible fear overcomes all he is fighting.
Also, he can use blood as water similar to Tia Halibel's powers.
Character info: First, the appearance. His mask remains on all of his head but the bottom part of his face, starting just below the nose. The mask itself has sweeping horns that blend into a pair of extended spines along the cheekbones andagain at the corner of the jaw. Though the mask has eye sockets, it has no eye holes. There is also 'armour' of bone that formed around his clothing. Following the line of his ribs, chest, spine, and lower half of his limbs, he also possesses a 'tail' of bone that cannot move as well as bladed claws on his hands and feet from the bone that lines his body.
The sword he carries is held at the back of his waist, under the tail (it leaves his body above the pelvis) and his clothes are an open-front shirt and an elaborate tabard.
When in his released state, ArraHass calls his form the JurakTahr. the Blood Dragon.
Though he is one of the many Arrancar made with the Hokyogou, ArraHass is not loyal to Aizen in the least. He is quiet, always talking in a hushed murmur, but when he does speak there is a feeling of isolation in his voice.
He despises all other Hollows and Arrancar. They shouldn't be. And that Aizen made him into what he is now only makes him more resentful. He disliked being undead to begin with, but accepted it as his lot; seeking solitude from the other Hollows, but they sought him out to eat him and he learned to fight them well... Eventually becoming an Adjuchas in the shape of a macabre Dragon, which he embraced. Seeing himself as above all other Hollows, ArraHass took to the skies and touched the ground only to bring fear and destruction to Hueco Mundo and to feed, then back into the skies.
Now that he's an Arrancar, ArraHass spends nearly all his time in his humanoid form. His reasons? "The body I have is much like the armour I used to wear in life. So long ago. But the real problem is, I can't stay long in my natural body anymore." As it taxes his energy too much.
If there is one thing he dislikes more than Hollows or Arrancar, it is the Vaizard. People trying to be the abhorrent undead is something he just doesn't understand. And doesn't wish to.
All in all, he considers himself to be on the Soul Society's side, and their approval is not required.
When in his released state, ArraHass appears to be a massive Porcelain Dragon that drips slowly with a thick, crimson Ichor. The shapeshifting remains, but he must devour the person he wishes to impersonate... this gives him their memories when in their form, essentially possessing the person themselves.
Eyes: Black whites and Red irises.
Size: about 6'2" and athletic build
Aspect of death he represents: The dread you feel as you cannot avoid it. Rumoured to have drowned in his life.
Sorry if it's too long or whatever. :P