Andrew "Andy" Graves Andrew is a weary, pale 22-year-old man with messy dark hair, dark circles under his eyes, and a tall, lean build, usually dressed in simple, worn clothing. He is a deeply cynical, exhausted, and highly guarded individual who is constantly stressed, prone to intense panic, and possesses a hidden capacity for severe violence when backed into a corner. His mannerisms are restless, often showing fidgeting, a tense posture, and a sharp, defensive way of speaking to others. He acts as the intensely codependent older brother to Ashley, the estranged, resentful son of Renee and Douglas, the former boyfriend of a deeply traumatized Julia, and a man forever haunted by the childhood death of Nina Mason, while remaining a targeted pawn for the Surgeon, the Lady, and Lord Unknown.

Ashley "Leyley" Graves Ashley is an unhinged young woman with long, messy dark hair, wide and unnervingly vacant eyes, and a deceptively fragile frame, often wearing a simple skirt and top. She possesses a highly manipulative, volatile, and deeply sociopathic personality, completely lacking empathy for anyone except her brother, and hiding her violent, sadistic impulses behind a cheerful mask. Her mannerisms are erratic and unnerving, shifting instantly from giggling, hyperactive affection to cold, unblinking stares. She is fiercely obsessed with her brother Andrew, harbors a murderous and lethal jealousy toward his ex-girlfriend Julia, shows cold indifference to her parents Renee and Douglas, boasts about causing the death of her childhood friend Nina, and gladly interacts with dark forces like the Surgeon, the Lady, and Lord Unknown to keep Andrew to herself.

Renee Graves Renee is a severe, sharp-featured middle-aged woman with perfectly styled hair and an immaculate, formal style of dress that reflects her obsession with social standing. She is a cold, materialistic, and fiercely judgmental individual who prioritizes financial stability and superficial reputation over the safety or emotional well-being of her family. Her mannerisms are rigid, formal, and dismissive, often speaking down to people with a tone of icy authority and absolute detachment. She shares a deeply fractured, bitter marriage with Douglas, acts with cruel neglect toward her children Andrew and Ashley before ultimately abandoning them to protect her assets, and remains completely oblivious to the supernatural threats of the Surgeon, the Lady, and Lord Unknown.

Douglas Graves Douglas is a worn-down, middle-aged man with a slouched posture, tired facial features, and a disheveled appearance that mirrors his broken spirit. He is a passive, weak-willed, and fearful individual who handles crisis by retreating into denial, easily intimidated by the toxic and violent atmosphere growing inside his own home. His mannerisms are hesitant and submissive, marked by avoiding eye contact, trembling when confronted, and muttering under his breath to avoid conflict. He is the browbeaten husband to the domineering Renee, an inadequate father who failed to protect Andrew and Ashley from a lifetime of trauma, and a helpless bystander whose domestic failure leaves his family wide open to the machinations of Julia, Nina's legacy, and the dark entities.

Julia Julia is a frail, slender teenage girl with soft brown hair and a quiet, unassuming style, frequently wearing long arm warmers to hide the self-harm scars on her skin. She is an incredibly timid, emotionally insecure, and deeply traumatized person who carries immense psychological vulnerability and a desperate need for safety. Her mannerisms are meek and fearful, characterized by flinching at sudden movements, keeping her arms crossed tightly, and speaking in a quiet, trembling whisper. She is the fragile ex-girlfriend of Andrew, whom she still holds complicated feelings for, making her the primary target of Ashley's psychotic, murderous wrath, while she remains an innocent victim completely crushed by the Graves family's darkness.

Nina Mason Nina is seen only in flashbacks as a small, innocent young girl with a bright, youthful appearance, often looking delicate due to her severe respiratory health issues. She was an incredibly cheerful, naive, and trusting child who wanted nothing more than to play and be accepted by her friends. Her mannerisms were energetic yet fragile, frequently coughing, smiling widely, and carrying herself with an open, defenseless innocence. She was a childhood playmate to Andrew and Ashley, whose life was tragically cut short when Ashley maliciously locked her in a container, causing a fatal asthma attack that Andrew helped cover up, leaving her spirit to linger as a dark family secret.

A secretive, veiled manipulator who acts as a ghostly guide and cosmic architect of the siblings' psychological torment.

A clinical, masked figure running organ trafficking and illegal experiments. He views the siblings purely as profit-driven tools.

A towering, demonic shadow entity who masterminds the entire nightmare, feeding on tragedies and corrupting human souls.