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Soon-ja Yoon

Soon-ja Yoon is the paternal grandmother of Travis Yoon and Hana Yoon, and the mother of Sung-ho Yoon. Born in Gyeonggi Province in South Korea, she immigrated to the United States at a point in her life that has not yet been fully established, eventually settling in Evanston, Illinois within the extended Yoon household. She is the origin of the folk melodies from Gyeonggi Province that Travis carried in his ear his entire life — hummed in the kitchen, shaped into the pieces he composed privately at Juilliard, and ultimately transcribed into the Korean Folk Melody Album that survived him. She is, without having intended it, one of the foundational creative forces in the Faultlines universe.

Overview

Soon-ja's presence in the Yoon household is expressed through action and attention. She cooks. She watches. She makes things with her hands that carry the weight of care without announcing it — the quilt she sewed for Travis because he struggled to keep warm, stitched before anyone knew he was sick, that ended up covering him in his hospital bed in Evanston during the worst months of his life. She is not demonstrative in the manner of people who have been taught to name their feelings. Her language is the backs of her fingers against a cheek, a quilt spread over a child with no motion wasted, a bowl of soup set down without comment that means I see you, I'm here, eat.

She is the grandmother Hana would later describe, in an interview about her marine biology career, as having "watched the world the way you'd watch the sea" — with total attention and no urgency to make it say something it wasn't ready to say.

Background

Soon-ja grew up in Gyeonggi Province, the region surrounding Seoul, and came of age in a Korea shaped by the aftermath of the Korean War and the rapid industrialization of the following decades. The folk songs she carries — the ''gyeonggi minyo'' tradition, the melodies from the province's fields and markets and households — are not museum pieces to her. They are the texture of her childhood. She hummed them while cooking without thinking about them, the way people hum things that entered early enough to become interior rather than learned.

The details of her immigration to the United States and the arc of her life before Evanston are not yet fully established.

Role in the Yoon Household

Soon-ja lives with or in close proximity to the Sung-ho and Eun-joo household in Evanston, her presence woven into the daily fabric of the family in the way of grandparents who have become structural rather than occasional. She cooks; her recipes define the household's memory of home. Korean is the language of her kitchen and her interactions with the family, the language in which the household's deepest register operates, the one that surfaces in the children when the English-speaking layer falls away.

She made both Travis and Hana with her attention in distinct ways. Travis she watched most carefully — the quiet child who sat on floors when chairs were available, who saved every sea creature photo his sister sent, who composed in corners without drawing notice. She recognized something in him she didn't try to name. She made him a quilt.

The Folk Songs and Their Legacy

The music of Gyeonggi Province that Soon-ja carried from her childhood — hummed in the kitchen, sung under her breath while her hands worked — became the source material for Travis's final compositional project, the Korean Folk Melody Album. Travis had been listening to those melodies his entire life without fully understanding what he was doing with them: absorbing them, holding them, turning them over in the compositional part of his mind where everything he heard eventually became structure.

The cello-led string quartet that forms the centerpiece of the album — the piece he was trying to transcribe the night chemo pulled him under mid-word, the three measures that became Ezra's Travis Yoon Wrist Tattoo — was built from one of her melodies. A phrase from Gyeonggi Province, carried across an ocean in a woman's memory, passed silently to a grandson who listened, arranged for string quartet by a boy who refused to disappear without leaving something behind, and released to the world by the roommate who finally learned how to listen.

Soon-ja heard the finished album after Travis's death. What that was like for her has not yet been established in the record.

Travis's Illness and Death

When Travis returned to Evanston from NewYork-Presbyterian in February 2025 after completing induction chemotherapy, Soon-ja was one of the people who came down the porch steps to meet the car. She moved more carefully than she used to on the ice. When Travis was guided past her through the doorway — barely present, leaning, going where he was steered — she put the backs of her fingers against his cheek. Briefly. Then she held the storm door.

After he was settled in his room, she spread the quilt over him without being asked. Her hands moved the way they moved when she did anything with care: precisely, no motion wasted. She smoothed the edge once.

Throughout the consolidation period, she cooked what Travis's body would accept — a moving target, given the nausea and taste changes and unpredictable appetite that chemotherapy produced, requiring daily recalibration of what was possible. She did not comment on the adjustment. She adjusted.

She was in Evanston when Travis died in August 2025. Further details of that period are not yet established.

Relationship with Ezra Cruz

Main article: Ezra Cruz and Yoon Family - Relationship

Soon-ja's relationship with Ezra Cruz developed during Travis's illness and persisted after his death. She was among the Yoon women who, after August 2025, decided that losing Travis did not require losing Ezra — who had arrived in a triage bay and spent six weeks earning a place in the household, and who needed somewhere to put what he was carrying after the reason he'd arrived was gone. The specifics of her relationship with Ezra are developed further in the family relationship file.

Characters Supporting Characters Living Characters Korean Characters Yoon Family Evanston