Juri Yukawa is the main protagonist of the story and a young woman at a crossroads in her life. She is 28 years old and lives in a crowded household with four generations of her family, including her retired grandfather, unemployed father and older brother, her working mother, and her older sister who is a single mother to a young son named Makoto. Feeling the weight of her circumstances, Juri is unemployed and has endured a demoralizing string of nineteen failed job interviews, a situation that fuels her frustration and her urgent desire to leave her hometown before she feels trapped by the same stagnation affecting the other adults in her family.

In her daily life, Juri presents a headstrong and mischievous personality, often acting as a dependable figure who is not afraid to speak her mind. Despite her frustration with her unemployed father and brother, she feels a deep sense of responsibility for her family's well-being. This sense of duty is particularly strong toward her young nephew, Makoto, and she carries a significant amount of guilt and self-imposed pressure to be the primary source of income for the household.

The central event of the narrative is triggered when her brother, Tsubasa, and nephew, Makoto, are kidnapped by a cult demanding a ransom. Driven by guilt for not being the one to pick Makoto up from daycare that day, Juri resolves to confront the kidnappers herself with a kitchen knife. Her plan is halted by her grandfather, who reveals a family secret: a mysterious stone that allows its users to enter a dimension called Stasis, a world where time stands still for everyone except those who carry the spirits known as Specters.

As a member of the Yukawa bloodline, Juri has a unique and powerful connection to Stasis. It is revealed that she first entered this world as a child when her grandfather took her there to spend more time with her dying dog, Andre. During that traumatic incident, her emotional turmoil awakened a dangerous and rare ability. In Stasis, Juri possesses the power to forcibly expel Specters from a person's body with a single palm strike, an action that is often fatal as it returns the victim to normal, frozen time. When she activates this ability, her eyes turn a milky white, and she can see the flow of Specters within a person.

Her key relationships are primarily with her immediate family. She is the second daughter of Takafumi Yukawa, the sister of the reclusive Tsubasa and Sanae, and the aunt of Makoto. Her grandfather is a crucial figure, both as the keeper of the stone's secrets and as the one who once forbade Juri from ever entering Stasis again after witnessing the danger of her power firsthand. Beyond her family, her most significant relationship is with the primary antagonist, Junji Sagawa. Over the course of the struggle in Stasis, Juri comes to a startling realization that she and Sagawa are fundamentally similar, both feeling trapped by lives they did not choose. This leads to a complex resolution where she chooses to raise a reincarnated baby version of her enemy, vowing to give him a better life.

Throughout her journey, Juri's character development is driven by her experiences of isolation and responsibility. She is forced to confront her own flaws, including her stubbornness and her tendency to carry burdens alone. The narrative does not drastically change her core personality but rather tests and hardens her existing traits, revealing a deep well of resolve and a willingness to sacrifice her own freedom to protect her family and uphold her moral choices, such as her decision to remain alone in Stasis for an extended period to raise the infant Sagawa. Her physical appearance is marked by her short brown hair, brown eyes, and a distinctive wardrobe consisting of a coat akin to a lab coat worn over a blue t-shirt and shorts.