Name

Arthur Cadeyrn

Alias(s)

Martyn Sullivan

Robert Báthory

Nickname(s)

The Hybrid

Arty

Abomination (mostly by Witches)

Monster

The Beast (By most who don't know his name)

Klaus' Experiment (mostly by Damon Salvatore

Glutton Boy (By Damon Salvatore)

Age

24 (can be changed on rp)

Gender

Male

Sexuality

Heterosexual

Species

Werewolf (formerly)

Vampire/Werewolf Hybrid (current)

Personality

Arthur is a rather calm and collected individual, often shown as keeping his emotions in check and never revealing anything that could risk his safety. He is the definition of a predator, usually keeping quiet, moving with a grace, reminding many of a apex predator by his mere presence. But even so, he is extremely loyal to the few that he deems close.

But even with his calm persona, Arthur is known to be playful, mischievous and curious, seemingly taking nothing serious and will do as he wishes, no matter who tells or asks something from him. 

However, do to the fact he is a Hybrid, his emotions and personality are on overdrive and boosted ten-fold, so if and when he ever looses his cool, it's like hell has been unleashed upon Earth.

Along with this, he has a problem controlling his blood lust, and struggles to hold it down whenever he feels hungry. His ruthless and vicious hunger make many speculate that he could be a Ripper, but no one is too sure do to his usually calm behavior outside of feeding, and the fact he never seem to black out from said feedings, as so many Rippers are known to do.

However, one of the most unusual aspects of the hybrid is the fact he doesn't limit his feeding sprees to just humans. Known to be curious and a common feeder on other supernatural creatures as well, be it werewolves, witches, vampires, which has made many fear and become wary of the gluttonous hunter.

Appearance

Arthur is often called extremely handsome, a surprising contrast to what people who haven't met him believe do to his savage reputation. Being a young man with fair, if not slightly tanned, and flawless skin, dark brown, curly hair and brown/hazel eyes. He stands at a height of 5'7, with a lithe body figure, yet well muscled, but not bulky, more like a swimmer, or runner's.

His fangs are long and sharp, with a pair up in the usual canines, along with the ones in the lower row of teeth.

Fangs

Style of clothing

Casual

Formal

He can also be seen wearing a pair of rounded sunglasses

Powers

Compulsion - the ability to bend someone to follow your orders, usually only affects mortals/humans, unless they have Vervain in their system (or other supernatural method for protection)

Supernatural speed

Supernatural Strength

Immortality - can only be killed by either cutting his head off or ripping out his heart

Wolf form - do to being a Hybrid, Arthur can turn into a wolf at anytime he wishes, not bound to the Full Moon like Werewolves

Claws

Fangs

Day Walking

Werewolf Venom - a toxin within his fangs that is lethal to Vampires with a single bite

Weaknesses

Vervain

Wolfs-bane

Can be killed if his head is cut off or heart ripped out (duh)

Invitation- Do to his Vampire heritage, he can only enter a home if invited inside

Wood - while it isn't as lethal to him as it can be to Vampires, it is still painful to be shot with wooden bullets or stabbed with a stake, and can be a method to stagger a Hybrid.

Wolfsbane- Much like their normal werewolf counterparts, Arthur is a victim of weakness to the poisonous plant.

Backstory

Arthur isn't sure about what happened in his previous life as a mortal human, seeing as the first thing he remembers was waking up in an alley in Chicago, nude as the day he was born and covered in blood.

He had quickly gotten himself cleaned and stolen some clothes after that, and tried to figure out what had happened. He later on found out about the Hunger, and instantly later that night, slaughtered a group of homeless people underneath a bridge, devouring their blood and leaving no survivors that night.

The days turned to weeks, and months, yet he still couldn't remember his previous life, but by now had managed to figure out what he was, and gotten help by a few people (some freely, and some not so much) and managed to adjust to the Supernatural world....

Several months after he was turned, Arthur has gotten the hang of it all, and with his "chains" of humanity broken, without having to turn off the "Switch", has become known as one of the most infamous killers and predators in the Supernatural World.

What Arthur doesn't remember however, was the fact he used to be a werewolf, who was turned into a hybrid by Klaus after he finally broke his curse and figured out how to create said hybrids.

As a curiosity and experiment, Klaus compelled Arthur to completely forget every memory of his former life, as both a human and werewolf, leaving only his instincts and hunger behind... 

Affiliation

Himself (for the most part)

Kathrine Pierce/Katerina Petrova

Silas (for a time/formerly)

Mystic Falls group (for a time/truces/alliances)

Enemies

Klaus (Sired by him)

Silas

The Travelers

Hunters

The Mystic Falls Group (formerly/at some point)

Damon Salvatore

Stefan Salvatore

Elena Gilbert

Frenemies 

Elija Mikaelson

Kol Mikaelson

Caroline Forbes

Rebekah Mikaelson

Love Interest(s)

Kathrine Pierce/Katerina Petrova

Caroline Forbes

Rebekah Mikaelson

Other

Arthur, even with his seemingly short time as a Hybrid and time in the Supernatural world, has quickly gained a reputation (Mostly the US) as the "The Modern Beast", after "La Bête de Gévaudan", who was a famous "monster" or man-eating animal, in Gévaudan, France, during the mid/late 1700's. Who many associate as being a werewolf. 

Do to his condition of amnesia, Arthur haven't shown any signs of loyalty created by the Sire Bond all Hybrids create with their maker (Klaus), studies and observations made by various people suggest it is do to the fact he was compelled to forget everything about his past, including the pain of turning every full moon, which was the main reason for the Hybrids loyalty to Klaus, and the anchor of their Sire Bond. 

(So without that gratitude, Arthur has no Sire Bond created loyalty to Klaus, and as such, is why many view him as a wild card) 

Has Amnesia

Is often called a glutton do to his zealous feeding

One of the few times he isn't on a feeding rampage, he can be seen with a pastry or other snack in hand, or a drink (most likely to try and subdue said feeding rampage)

Like how werewolf and vampire eyes turn a certain color when revealing their Supernatural side, Arthur's sclera (the white of the eye) turn a dark, black color, making his eyes look even more demonic then usual.

What his claws looks like when he activates them

His Wolf form