The café's manager and chef, Kazu’s cousin, with a reserved and intimidating presence, who focuses on supporting his family and the café visitors, although he has limited involvement in the time travel rituals.

A bold and playful staff member at the café, married to Nagare, whose warm presence and acceptance of life’s transience provides comfort to guests.

A newcomer to the café and time travel, a successful businesswoman who uses her visit to the café to navigate personal challenges and learn about the constraints of time travel.

Fumiko's younger boyfriend, a systems engineer with insecurities about his appearance, whose relationship with Fumiko involves navigating societal pressures and personal growth.

A regular at the café, a dull-looking man afflicted with Alzheimer's, whose deep connection with his wife is explored through time travel, despite his inability to travel himself.

Fusagi’s wife and a nurse, who navigates her husband’s illness and strengthens her understanding of their relationship through her experiences at the café.

A bold and irreverent regular at the café, she manages a snack bar and grapples with family issues, showing a distinct free-spirited style in contrast to conventional expectations.

Hirai's sweet and community-minded younger sister, who runs the family inn and remains hopeful of reconnecting with Hirai despite their estrangement.

The 15-year-old daughter of Kei and Nagare, who enters the café from the future, marked by her advanced technology and connection to the café’s time travel tradition.