Setsuko

Setsuko is introduced as a girl who spent her early childhood with Kaori Miyazono.

She is affectionately called “Setchan” by Kaori, showing their close and friendly relationship.

Setsuko appears at the piano recital where Kōsei Arima performs for the first time.

She participates as another performer at the same recital, placing her in the same musical environment as Kōsei and Kaori, even if only briefly.

Childhood Connection with Kaori Miyazono

Setsuko is one of the few people tied to Kaori’s early years, when Kaori was still a child.

Their bond is casual and warm, reflected in Kaori’s nickname for her, “Setchan,” which suggests an easy, intimate friendship.

Although not constantly present in the main story, Setsuko represents a piece of Kaori’s happier, more innocent past.

Her existence helps flesh out Kaori’s life beyond the main cast, hinting that Kaori had friendships and memories outside the central group.

Involvement in Kōsei Arima’s First Piano Recital

Setsuko appears at the venue of Kōsei Arima’s very first piano recital.

She is one of the children performing there, putting her on the same stage and in the same moment as Kōsei.

During this event, Kaori takes a commemorative photo together with Setsuko.

By pure chance, Kōsei is also captured in the background of that photograph.

The Photograph as Kaori’s Treasure

The photo of Kaori and Setsuko, with Kōsei accidentally appearing in the frame, later becomes a deeply cherished keepsake for Kaori Miyazono.

For Kaori, that single image combines her childhood friend, Setsuko, with the boy who would become central to her life, Kōsei Arima.

This photograph symbolizes the quiet, unseen way Kaori’s life and Kōsei’s life had already intersected.

Because of this, the memory of Setsuko and that day at the recital gains strong emotional weight for Kaori.

While the original description offers few direct details about Setsuko’s personality, her presence at a piano recital suggests that, like many children around the main cast, she is involved with music.

Her friendly relationship with Kaori implies that she is approachable and easy to get along with.

Kaori Miyazono

Setsuko is a childhood friend of Kaori Miyazono.

The use of the nickname “Setchan” hints at a close, affectionate dynamic between the two girls.

Their shared photo represents a moment of simple childhood happiness.

Even later, when the story turns more dramatic, that memory continues to shine brightly for Kaori.

Kōsei Arima

Setsuko has no direct, developed relationship with Kōsei Arima in the main narrative.

However, their lives cross indirectly at Kōsei’s first piano recital, where both are present as performers.

Kōsei appears in the background of the photo taken of Kaori and Setsuko.

Because that photo becomes a treasure to Kaori, Setsuko is quietly tied to one of the most meaningful images in Kaori and Kōsei’s shared story.