Mary Oh

Mary Oh is William Oh’s missing mother and Thomas Oh’s climbing partner, remembered less through direct appearances than through the scale of the mystery surrounding her disappearance. Gertrude identifies Mary and Thomas as Climbers who did not stop after securing money or power; they pursued The Tower’s unanswered questions until their expedition became inseparable from the Tower’s buried history. Their absence leaves William with both a family loss and a possible inheritance of dangerous knowledge.

Identity and Background

Mary Oh is named as one of William Oh’s parents. The evidence does not supply her age, appearance, class, abilities, or precise history before she began climbing, but it firmly places her within the culture of high-level Climbers. Gertrude recalls having climbed as far as the Twelfth Floor herself and distinguishes between two broad kinds of Climbers: those who seek wealth and power and eventually establish small kingdoms somewhere between the Eighth and Fifteenth Floors, and those who become addicted to challenge and to uncovering The Tower’s mystery. Mary and Thomas belong to the second category.

That classification gives Mary a purpose more demanding than ordinary advancement. Her climbing was not presented as a route toward a comfortable domain or political power. It was driven by the need to investigate the unresolved remnants of an unknown past. Gertrude’s account therefore defines Mary through persistence, curiosity, and a willingness to continue beyond the point at which many Climbers would settle.

Pursuit of The Tower’s Mystery

The mystery Mary pursued is not abstract. Gertrude describes vestiges high in The Tower that cast doubt on accepted knowledge, including ruins whose outline matched the layout of Gertrude’s hometown exactly, down to the location of her father’s bakery. Rather than dismissing such correspondences as coincidence or illusion, Gertrude says that she has witnessed too many strange coincidences to accept an easy explanation. This is the intellectual atmosphere in which Mary and Thomas continued their climb: every discovery generated further questions instead of closing the case.

Their determination also creates a striking contrast with the more conventional Climber’s ambition. Wealth-and-power seekers stop after carving out a kingdom; Mary and Thomas are described as people addicted to the challenge itself and to the act of uncovering what The Tower conceals. Their objective is consequently both exploratory and existential. They are not merely searching for treasure or status, but testing whether the world’s apparent history and structure can still be trusted.

Disappearance and William’s Inheritance

Mary’s disappearance is never resolved in the supplied evidence. Gertrude says that Mary and Thomas continued onward, while also acknowledging that she has little hope they will return. Her judgment is severe because the pair may have reached a point where the danger of The Tower has overwhelmed ordinary expectations of survival. At the same time, Gertrude believes that, if they did return, they could shed more light on The Tower’s mystery than any other Climber, living or dead. Mary’s absence thus remains both personal and investigative: William has lost his parents, while the world may have lost its best witnesses to the Tower’s past.

The uncertainty surrounding Mary affects how others interpret William. At Brenda’s Inn, Jason Salazar repeats a legend that a figure named William was born on the Hundredth Floor, where lethal Miasma supposedly granted abilities beyond human comprehension. When a Climber challenges the story by observing that no pregnant woman could have reached that floor, Jason identifies the parents as Mary and Thomas Oh. The scar-faced Climber immediately pales and leaves with a companion, showing that the names carry significance beyond William’s orphaned identity. The scene does not confirm the legend, but it demonstrates that Mary’s name is already connected to rumors about extraordinary origins and inaccessible heights.

Narrative Significance

Mary functions as an absent center of the story’s family mystery and Tower mystery at once. Her relationship to William is established through parentage, but her larger importance comes from the questions her expedition leaves behind. The possibility that she and Thomas could explain more about The Tower than any other Climber makes their disappearance a form of withheld knowledge: William’s personal past and the world’s historical truth are entangled in the same missing pair.

Her legacy also shapes the choice placed before William. Gertrude asks what kind of Climber he wants to become after explaining that his parents pursued mystery rather than kingdom-building. Mary is therefore not only part of his background; she represents one of the possible models for his future. The evidence does not state whether William will follow her path, reject it, or surpass it, but it makes clear that every decision about his own climbing occurs under the shadow of Mary and Thomas’s unfinished search.