Yozo's friend and fellow artist from Tokyo, serving as a guide to the city's nightlife and hedonistic pleasures. Despite their kinship, his relationship with Yozo is complicated by mutual manipulation and conflict.

A high school acquaintance of Yozo who perceives the truth behind Yozo's playful facade. He introduces Yozo to the concept of "ghost portraits," predicting his future in both art and relationships with women.

A young woman whom Yozo marries, providing him with a temporary sense of stability and trust. Her unwavering belief in Yozo contrasts with his descent into alcoholism and despair.

A hostess from Tokyo who crosses paths with Yozo during his escapades. Her melancholy and connection with Yozo culminate in a shared depth of emotion and contemplation of life's hardships.

A single mother who takes in Yozo, offering him care and a semblance of domestic life. Her support allows Yozo to experience a temporary familial bond, which is ultimately disrupted by his actions.

A business associate of Yozo's father, whose ambiguous role extends to providing unofficial support and advice to Yozo. His interactions with Yozo often lead to both assistance and confusion.