Director Jessica Grey was the head of the Anti-Monsters Department, the District Leader of Determino succeeding Noah Rutrow, and the mother of Alina Grey Rutrow. After her daughter ran away, Jessica fell into a state of depression, losing her SOUL Trait of Integrity. Twenty years later, monsters were freed from the Underground, but Jessica distrusted them, so Frisk spent a month convincing her that monsters were allies to humans. However, Jessica swore revenge on them after learning that Asgore Dreemurr murdered her daughter, forming a temporary alliance with Bête Noire. She then played a major role in Sans's death, to which she deeply regretted and started redeeming herself, but she could not be forgiven by W. D. Gaster. Eventually, as Jessica and Gaster scouted through Determino City, they were attacked by the Kumuzilla, who sent rubble entrapping them. Following a last, remorseful conversation with Gaster, Jessica sacrificed herself by saving Gaster, leading to her getting crushed to death. Finally, Jessica happily reunited with her family in the Afterlife.