Character: Seth Matthews and His Bond-Ghost: Darling

(Anton Yelchin as Seth)

Different from both his siblings, Seth doesn't remember much about his parents so the prejudice that they have to face because of their parents' actions didn't feel as personal. Seth doesn't care much about the past, he was all about the moment, the right now. He's a little bit reckless and has edges so sharp it draws blood everytime he bumps against someone. 

He met his Bond-ghost Darling when he was six, bonded with her when he was eight much to the consternation of others. His was the youngest bond ever and people are waiting for it to fail, but even though the situation between Seth and Darling isn't quite ideal, it works. 

When most ghosts look faded and grey the longer they exists in the world, when Seth meets Darling, she is vivid in color and she stays that way the few times they see each other which told Seth that Darling isn't dead but that she is unconscious somehow. 

Darling keeps her real name and her situation close to her chest even from Seth and Seth doesn't really care as long as she does her job, at least, that's what he tells himself when Darling disappears once or twice to visit wherever her body is.

(Isabelle Fuhrman as Darling)

Unlike the relationship between the twins and their bond-ghosts, Seth and Darling's relationship is a lot less like friends and closer to business partners. But it is no lie that they are one of the best Reaper teams and that both understood the other really well despite that they don't share anything personal about each other. 

What they have--their Bond--was personal enough for their tastes. 

Darling is an odd one from the start, quiet, watchful and wary, she drifts in and out of the Matthews house. She is perhaps the ghost that makes the hardest effort to look alive from the vivid colors that emanates from her to her clothes that always changes day by day. And she grows with Seth back from when Seth was six, Darling also looked six and now that Seth is seventeen, Darling also looks seventeen. 

She is secretive and has a wicked sense of humor which rarely shows. She loves a good brawl and knows how to fight in the dirtiest day possible. She takes her job seriously and watches over Seth when he sleeps like a hawk guarding over her territory. 

Being a Bond-ghost she is given a choice once in a while to possess Seth for good behavior or for protection but Darling usually only uses his body to eat, to feel and taste food again. 

Lately she's been more secretive than ever and it strains their partnership but neither of them knows how to fix it. 

Character: The Matthews Twins and their Bond-Ghosts

(Maddie Hasson as Nadia Matthews)

Fraternal twins, Nadia is blonde and slim like her mother while Nate has the curly dark hair and strong jaw of their father. The only thing they share is the solid shade of blue of their mother's eyes.  

Both are competitive and stubborn and likes to argue, especially with each other. 

(Jesse Eisenberg as Nate)

While Nadia has a volatile temper, quick to blow and equally quick for said temper to blow over, Nate simmers silently and can hold a grudge until the world stops turning. 

Both are competitive and stubborn and likes to argue, especially with each other. 

Like most Twins are, they have a strong mental bond with each other, so much so that if Nate was injured, Nadia not only feels the injury but also suffers the physical injury herself. 

Years older than their younger brother Seth, they act more like his younger siblings but when push comes to shove, the twins will do anything to save their baby brother. 

Reapers have a personal sigil, a magical circle that they apply when catching a ghost and tying them down to our dimension in order to seal them away, and this sigil usually manifests as a mirror of their inner personality. Nadia's sigil, much to the amusement of her two brothers, takes form in a circle made by thorns while Nate's is a circle made of blue fire. Interestingly, both their circles fit together completely, allowing them to work simultaneously with both sigils much to the dismay and envy of other Reapers. 

Bond-Ghosts

Bond-Ghost are the guardians of Reapers, as Reapers are vulnerable to possession and mental attacks, the Bond-Ghosts protects them from such dangers. Souls connected, they draw power and stability from each other. Having a Bond-Ghosts is a big deal for Reapers and is chosen carefully because the connection once made can only be severed by death. 

It is not strange if a Reaper risks possession rather than choose the wrong ghosts to bond with. 

(Max Irons as Vincent)

Vincent is an Englishman who lived in the Victorian era who holds not-so-Victorian values although he often chides Nadia for her foul mouth and unlady-like behavior just to needle her. He is very protective and secretly ruthless. Nate often commented that Vincent was either an assassin once upon a time or a politician. Vincent has a sly wit and a dry sense of humor that makes Nadia snicker and leaves everyone else confused. Indolent by nature, it takes a while to rile him up but when he's rile, it's hard for him to come down again. 

(Zoey Deutch as Lizzie)

Lizzie owned a salon in the wild wild west once upon a time, she hides a blade in her corset, a derringer under her bustled skirts and a knife in her boot. Bold, flirtatious, wild, Lizzie delights in scandalizing everybody with her ever-changing wardrobe that shows off her assets becomingly. And Nate only encourages her, amused by her wiliness and cunning. Both Lizzie and Nate are bad influences on each other but she is fierce in protecting her Reaper, launching everything in her considerable arsenal at the mere mention of danger in Nate's vicinity.