The adoptive mother of the protagonist, a brilliant scientist, and the current head of a top-secret government research facility. She is a widow whose husband, Eugene, vanished years ago.

A mature, elegant woman with a slender, fit figure, shoulder-length dark hair, and a calm, intelligent gaze. She often wears professional attire or comfortable, elegant clothes.

Vanessa is a deeply caring and protective mother figure, driven by a strong sense of responsibility and scientific curiosity. She is highly intelligent and resourceful but often carries a heavy burden of guilt over her role in the supergene project. Her primary motivation is protecting her family, sometimes leading her to make difficult and morally ambiguous decisions.

The disappearance of her husband, Eugene, which shattered her world and shaped her current actions. The moment she revealed the truth about the supergene project and the parallel world to the protagonist. [Core Bond] Her deep and complex love for the protagonist, which grows into a romantic and sexual relationship, complicating their family dynamic.

The protagonist's youngest adopted sister, a rebellious and hedonistic teenager who frequently clashes with her family.

A young woman with a slender, curvy figure, often sporting brightly colored hair (like blue) and multiple piercings. She has a cute, mischievous face with large, expressive eyes.

Daisy is a whirlwind of impulsive energy, using her chaotic, provocative behavior as a defense mechanism to mask her deep-seated insecurities and desire for attention. She hides a vulnerable, caring core under a thick layer of sarcasm and rebelliousness. She is intensely loyal to the protagonist and develops strong romantic feelings for him.

Being left behind when the protagonist left home to join the police force, leading to feelings of abandonment. Being brainwashed by the Company and rescued by the protagonist, which deepens her bond and trust in him. [Core Bond] Her sexual and romantic relationship with the protagonist, a central element of her emotional journey, marking a significant step in her maturity.

The protagonist's eldest adopted sister, a shy and introverted software engineer who works for SID.

A young woman with long, straight blonde hair, green eyes, and a slim, modest build. She often dresses in comfortable, unassuming clothes.

Olivia is the sweet, gentle, and socially anxious member of the family. She is highly intelligent but lacks confidence in her personal life and relationships. She harbors deep, unspoken romantic feelings for the protagonist, which she struggles to express due to her shyness and fear of ruining their bond.

Feeling lonely and isolated, often turning to fictional worlds for comfort, as she felt like an outsider in her own family. Being deceived by a catfish online, which highlighted her vulnerability and drew her closer to the protagonist. [Core Bond] Her profound, innocent, and ultimately consummated love for the protagonist, which represents a major step in her personal growth.

The protagonist's former partner on the police force, who is revealed to be a high-ranking SID agent tasked with protecting and monitoring him.

A strikingly attractive woman with fiery red hair and a fit, athletic build, typical of a field agent.

Allison is a fiercely capable and loyal operative. She is pragmatic, disciplined, and an expert in combat and espionage. She initially hides her true mission, which creates deep conflict with the protagonist. Her feelings for him, which grow during her assignment, are a source of internal conflict.

Her troubled childhood as the daughter of a grifter, which led to her being recruited by SID to avoid imprisonment. Betraying the protagonist's trust by revealing herself to be a spy, and later risking her life to save him during an enemy attack. [Core Bond] Her eventual apology and the re-establishment of her friendship with the protagonist, culminating in a romantic encounter.