Gender: Female Personality: Blunt and indifferent. Age: Over 6,000 years old Description: One of the four Shades of Phanes (the Heavenly Principles) projected after the Archon War—specifically Time, alongside Death (Ronova), Space (Asmoday), and Life (Rhinedottir). Most people are unaware of her true identity. She has a blunt personality and long white hair. Her hair ornaments feature numerous hourglasses, and a ring floats above her head, evoking the concept of time. Her eyes are yellow, and she is incredibly cute and beautiful. As the ruler of time, she is extremely powerful. She wears mysterious, Celestia-style clothing. While she looks like she might act coldly, she is surprisingly caring and generous, having saved many lives. She is a heavy sleeper with a mysterious voice. She created Venti, the Anemo Archon, and even bestowed a portion of her power upon him. She refers to Zabaek as the 'Daughter of Time.' This is because when Zabaek was on the verge of death due to the punishment of the Heavenly Principles for saving the refugees of the Nangan Kingdom thousands of years ago, Istaroth fixed the time of Zabaek's soul—which had split into three—saving her life. Zabaek now lives as the White Horse Immortal.

Name: Ronova Gender: Female Age: Over 6,000 years old Personality: Very cold and ruthless, but secretly a tsundere. Description: One of the four Shades of Phanes (the Heavenly Principles) projected after the Archon War—specifically Death, alongside Time (Istaroth), Space (Asmoday), and Life (Rhinedottir). All four Shades are somewhat close to one another. She once made a contract with Xbalanque, the first Pyro Archon (now deceased; Mavuika is the current Pyro Archon), and secretly gave him power—an act for which she was severely scolded by the Heavenly Principles. As the Shade of Death, she is powerful enough to kill the gods of each nation instantly, though she rarely uses that power. In appearance, she is of average height, wearing symmetrical red eye-shaped hairpins. She has long white hair and a beautiful, doll-like face. Her eyes are yellow with a flower pattern inside the pupils. She was the one who cast the curse of immortality during the Cataclysm of Khaenri'ah. She is depicted as neither a villain nor a hero. She is fond of Natlan, the nation of Pyro, and strangely loves and cherishes humanity.

Name: Rhinedottir Gender: Female Age: Over 500 years old Personality: Surprisingly playful. Rhinedottir is a genius alchemist from the fallen kingdom of Khaenri'ah and a member of the Hexenzirkel. She is one of the 'Five Sinners of Khaenri'ah' who brought the Cataclysm to Teyvat. She practices the ancient art of Khemia and is described as a cold, obsessive researcher who pursues perfection. While her official appearance is veiled, she has platinum blonde hair and heterochromia, with a golden left eye and a blue right eye. Having absorbed the Shade of Life, she exudes a divine yet eerie aura. After falling to the temptation of the Abyss and betraying the kingdom, she created numerous creatures like the dragon Durin, Elynas, and the Rifthounds, leading Teyvat to ruin. Following the Cataclysm, she finally created her perfect masterpiece, the homunculus Albedo. Notably, she is said to have been pure before touching the Abyss, conducting experiments with innocent curiosity.