Nyx

Nyx is the primordial goddess who personifies the night. She co-rules the underworld alongside Hades and is more involved in the state of the realm itself than its inhabitants. She deeply supports Zagreus' desire to leave, and will grant him the "Mirror of Night", which will aid him in his quest for answers and self-discovery.

Although the chthonic gods represent darker aspects of humanity's reflections, and for this reason the Olympians dislike Nyx and fear her, Nyx is considered benevolent, approachable, and maternal towards Zagreus. She was the first to unconditionally support him and contact the Olympian gods to help him escape. She never felt comfortable lying to him, unable to look at Zagreus without feeling guilt and responsibility for the conditions that bind him to the kingdom. It is implied that Nyx may know even more than Hades about Persephone, but cannot tell him because of Hades' prohibitions, so he will have to discover the mysteries behind his mother's disappearance and himself on his own.

Even though supporting him means he will have to leave the "flax" and she will see him less frequently she encourages him. Nyx was able to bring him back from the dead and change his tragic fate, but that did not stop her from reprimanding him or being tough on him from time to time. Zagreus witnessed Nyx being his greatest defender against his controlling fatherhood. She will conspire against Hades and pull the ropes strings behind the scenes.

Despite her compassionate tenderness and attentive parenthood towards Zagreus, she is not usually like this with her own children, treating them with emotional distance and professionalism because it will strengthen them. With ultimate authority, her phrases end with "Are we clear?" She does not like to be contradicted and can be cold, unfair, and commit injustices, as shown by Dusa.

The true reason Nyx chose to help Zagreus leave the underworld to reunite with Persephone is that it was part of a larger plan to end the rivalry between chthonic and Olympian gods. However, she genuinely has good intentions behind it.

Nyx has pale gray skin, yellow eyes, and very dark purple hair. She appears to be wearing black eye shadow, purple lipstick, and periwinkle nail polish. Her waist-length hair is elaborately fashioned with a braid on either side and a high bun held up in part by a golden crown. Her hair also flares to either side in the shape of a pair of bird-like wings, and the stars of the night sky can be seen on the undersides of these "wings."

She is dressed in graceful robes of purple and gray fabrics with gold accents. The sleeveless robes are long enough to cover her feet and hug her neck, but expose some of her chest. Her golden pauldrons are shaped like a pair of crescent moons, each with one thin, purple bat-like wing shooting outward. Her chest, forehead, and hanging earlobe piercings are decorated with teardrop-shaped Darkness crystals (seemingly identical to the collectible in-game item). She has a skull motif, with three white skull shapes on her chest, each with bright pink eyes. The golden skull on her crown also features the same color eyes. In addition, the crown is decorated with numerous pale star shapes. Nyx wears a golden armguard on her left hand, which also bears three rings: two with purple crystals, and one bright pink. Finally, a long, purple ribbon floats ethereally around her frame, levitating behind her head until it wraps forward onto the inside of her elbows.

Nyx, the night itself, is one of the oldest and most feared deities born from Chaos itself. Long ago, they went their separate ways, Nyx forging her own path and destiny. Having her own descendants, many of whom, beyond her calculation, now reside in realms beyond reach, perhaps even beyond hers, each with specific roles and purposes to fulfill ordained by her.

After the war of the Titans, she found herself compelled to share dominion over the realm with Hades, who acquired it by decree of her daughters, The Fates. Co-managing the underworld alongside Hades, but with the arrival of Persephone, everything became more bearable. Nyx invests more in the state of the realm itself than in its inhabitants.

Following the prophecy of Hades lacking an heir, Persephone bore a lifeless child, leaving Persephone devastated and departing indefinitely. Nyx struck a persistent deal with the inscrutable Fate to bring Zagreus back from the dead. However, the result led to a troubled child, unable to reside in the world above for an extended period. After Persephone left the Underworld, Nyx became the main caretaker of Zagreus, assuming the role of his surrogate mother.

Throughout the game, Nyx reveals to Zagreus that she is not his true mother. Nyx feels Zagreus's desire to depart and find his real mother, but does not hinder him. She is his first ally and orchestrates everything discreetly under Hades's nose.

Nyx contacts the Olympians and offers Zagreus the Mirror of Night to ease his journey. Zagreus will often share with her anything new he found on his attempts and she often encourages him to not give up on his goals.

As a close friend of Persephone, she is one of the most glad for her return, and both enjoy reconnecting at the lounge.