Cape No. 7

An unnamed teacher sent to Hengchun during the late Japanese era who falls for Kojima Tomoko. He writes seven love letters expressing regret for leaving her, a personal testament of longing across time. His story sets up the central romantic thread that later resonates with the present-day characters.

A Japanese fashion model assigned to Hengchun to manage a difficult local band project. She becomes Aga's mentor and later his love interest, navigating cultural expectations while helping deliver the past’s messages. Her granddaughter Mingchu's presence later connects the past to the present.

A struggling young rock singer who returns to his hometown and finds purpose by leading a makeshift local band. He discovers the seven letters and partners with Tomoko to return them, sparking a romance that mirrors the past.

Town Council Representative who leverages his official position to influence local decisions, including Aga's job as a postman and the concert lineup. His pragmatic approach inspires the local community to rally around a shared event.

The aging postman on leave after a motorcycle accident, whose vacancy becomes the catalyst for Aga's arrival back in Hengchun. He embodies the old guard of local service and the transition to a newer generation.

Hotel maid who helps Tomoko, and is revealed to be Tomoko's granddaughter. Her quiet support links the present-day story to Tomoko's past, guiding Aga toward the letters' rightful recipient.

Hotel Manager overseeing the Kenting resort where the beach concert unfolds; instrumental in coordinating the event and facilitating local participation.

Dada appears as a local figure whose life intersects with the emotional core of the letters and the town's social fabric; her interactions echo the film's themes of memory and continuity.