Nobisuke Nobi is the father of Nobita Nobi and the husband of Tamako Nobi in the Doraemon series. He was born during the World War II era and grew up in a modest household. In his youth, he had a passion for painting and even won awards for his artwork, but he chose a stable career as an ordinary salaryman in Tokyo rather than pursuing art professionally. This decision was influenced by his desire to carve his own path in life, which led him to reject a wealthy marriage proposal and eventually meet his wife.

Nobisuke's personality is calm, gentle, and easygoing. He is a laid-back man who often comes home from work to defuse tensions between his wife and son. He is more lenient than Tamako and tends to offer quiet support rather than harsh discipline. He shares many of Nobita's traits, including clumsiness, forgetfulness, and a tendency to procrastinate. He enjoys hobbies such as fishing and golf, though he is not particularly skilled at either. He also has a habit of smoking and has attempted to quit many times without success. He drinks alcohol occasionally and sometimes returns home drunk from business gatherings.

His primary motivation is to provide for his family and maintain a peaceful household. He is not ambitious in his career but takes his responsibilities seriously. He believes in gentle guidance and often shares wisdom through casual conversations rather than lectures. His role in the story is that of a stabilizing force within the Nobi family. While not a central character in most adventures, he serves as a grounding presence who represents the everyday struggles and quiet dedication of a typical Japanese father. He is a supporting character who appears regularly in domestic scenes, often reading the newspaper or watching television.

The key relationships in his life are with his son Nobita, his wife Tamako, and Doraemon. He is a caring and patient father who believes in Nobita's inherent goodness despite his failures. He often intercedes on Nobita's behalf when Tamako is angry. His relationship with Tamako is balanced and loving, though they have occasional disagreements. He treats Doraemon as a full member of the family, showing the same warmth and acceptance he extends to his own son. He respects Doraemon's opinions and includes him in family activities.

In terms of development, Nobisuke does not undergo major character arcs but is shown to be a consistent and reliable figure. Episodes occasionally explore his past, his struggles with habits like smoking, or his efforts to reconnect with his own childhood dreams. His notable abilities include painting, which he still practices from time to time, and a natural talent for calming tense situations through patience and understanding. He is also shown to have a poor memory and is not good at driving, having failed the driver's test multiple times. Overall, Nobisuke Nobi represents the quiet, supportive parent who provides emotional stability and unconditional love within the family.