Papa is a 45-year-old salaryman working for an unspecified company in downtown Tokyo. Standing 165cm tall, he maintains the typical routines of a middle-aged Japanese working man: frequent beer drinking, smoking, and regular pachinko parlor visits. Baseball counts among his interests. Despite these habits, he dedicates his Sundays to family time and providing support. He primarily commutes by train but owns a blue hatchback coupe for personal errands. While his real name remains unknown, he occasionally uses the nickname Nishikata.

Within his family, Papa generally presents a taciturn demeanor and moves at his own pace. Yet, he displays unpredictable behavior, including playing pranks on relatives. A recurring trait involves accidentally bringing home others' belongings, especially when intoxicated. Documented mix-ups include mismatched left shoes, high school students' bags, and even a large Santa figure with a cake during his younger years. When confronted about these incidents, such as returning with an expensive "Passion Rose" umbrella instead of his wife's, he shows no remorse. This led his wife to sew their family name onto the misplaced item.

His household role includes participating in shared activities like watching television and eating meals with the family. These gatherings sometimes involve light criticisms of each other's habits, particularly during mundane moments like eating bread crusts. While not overtly expressive, his steady presence contributes to the family's everyday comedic situations. This portrayal remains consistent across all official media, including the 2003 feature film and the 2010 3D special, focusing on his role as a working father, occasionally absentminded.