The characters in "Hasta el próximo café" are multidimensional and relatable, with their struggles, desires, and fears transcending cultural and linguistic boundaries. Kawaguchi's writing style, characterized by simplicity and elegance, allows readers to connect with his characters on a deep emotional level. The author's use of everyday situations and conversations renders the novel accessible and universal, making it easy for readers to see themselves in the characters' experiences. This universality is a testament to the power of human emotion, which can bridge even the most seemingly insurmountable cultural and linguistic divides.