From Wikipedia, for the uninitiated:
The story begins with an extraordinarily gifted boy named Eddie. Because victory in his endeavors comes so easily, it all seems meaningless. In despair, he throws a world-championship fencing match and becomes romantically involved with Jocasta Rose, a trainer twice his age. When Jocasta dies, Eddie leaves behind his life and takes on two new identities: Hunter Rose, successful novelist and socialite, and Grendel, elegant costumed assassin and later crime boss. Grendel is hunted relentlessly by Argent, a several hundred year old Native American man-wolf cursed with a thirst for violence. Argent works with the police in an effort to turn his curse to good.
Hunter Rose later adopts Stacy Palumbo, the young daughter of a mobster he killed. Stacy also befriends Argent. Hunter is a loving father to Stacy, but she betrays him to Argent when she discovers that he is Grendel. Grendel and the wolf fight on the roof of a Masonic temple. The battle results with Argent's paralysis and Grendel's death and unmasking. The police discover Stacy's role in this incident and that she murdered a governess to prevent interference with her plan. Developing severe psychological problems, Stacy is committed to a mental hospital until adulthood. After she is released, she marries her psychiatrist, but on their wedding night he rapes her and then commits suicide. The traumatic experience is enough that Stacy returns to institutionalization for the rest of her life. After she returns to the institution, she gives birth to a daughter named Christine Spar.Grendel is also a contagion, a virus of aggression that infects people and changes their lives and their perception of the world around them. Christine Spar and Brian Sung were each effected by Grendel, after the death of Hunter Rose, and became versions of the Grendel itself.
Grendel, in the form of Hunter Rose, is about a seductive and affable evil. An evil that does monstrous things, but also believes in the protection and sanctity of children (partially due to "Hunter Rose's" own past life). But Grendel is also a cipher. Hunter Rose is as much of a mask as the one that he wears while acting as Grendel. He writes insidious yet seductive novels and acts as an assassin.
Hunter Rose can make an excellent protagonist for your Fate Accelerated games, because of the challenges and moral dilemmas that he can represent. My writeup of him is going to be for my Paranormal Friction rules that I am writing, but it is easily adapted to the baseline Fate Accelerated rules. The introduction of Grendel into your games can be a game changer. Do the characters come together to try to stop him? Do they fear the Wolf, Argent, and instead attack him...taking away one of Grendel's major obstacles (and the cause of the death of Hunter Rose)? What impact does a still living Grendel have on the world at larger?
Why, you might ask, am I writing this up for a game of paranormal romance instead of SuperFAE or baseline Fate Accelerated? Well, the difference between Paranormal Friction and Fate Accelerated are minimal enough to not make a big difference, and I find that as a seductive form of evil, Grendel can have just as much of a place in a paranormal world as does a vampire. And, we never really know conclusively if Hunter Rose is human or not...
Hunter Rose/Grendel
High Concept: Call Me Hunter Rose
Trouble: The Demon of Society's Mediocrity
Aspiration: I Am In Control Of This
Aspects: Rakish Socialite On The Town, Roguish Assassin For The Underworld
Approaches
Careful +0
Clever +2
Flashy +1
Forceful +1
Quick +2
Seductive +3
Sneaky +1
Stunts
Because I am a Clever opponent, I can substitute my Clever approach during physical conflicts and challenges by spending a Fate Point.
Because I have such a seductive personality, I can get a +2 to Overcome when using my Seductive approach.
Argent, The Wolf
High Concept: Cursed To Be A Survivor, Cursed To Be A Wolf
Trouble: The Grendel Must Be Stopped!
Aspiration: The Troubles Of My Long Past Need Lifting
Aspects: Driven By Justice, Being Unsubtle Is A Tool
Approaches
Careful +1
Clever +2
Flashy +1
Forceful +3
Quick +2
Seductive +0
Sneaky +1
Stunts
Because I am a force for Justice from nature, I can substitute my Forceful approach in social and other non-physical conflicts by spending a Fate Point.
Almost as little is known of the Wolf, Argent, as is known about Grendel. He assists the NYC police in certain criminal underworld matters, mostly drug and child sex-rings related crimes. No one is sure how long he has been in the city, or what he actually is. When Grendel started making sounds in the underworld, the two forces faced off. One of the concepts that the original Grendel story played with was the idea that "Good" could be ugly and inhuman in appearance, while "Evil" was handsome and seductive.
Their final conflict left Argent paralyzed and Hunter Rose dead. This wasn't the last time that Argent would face a Grendel. either. Their fates became intertwined through their battles.