Mansaku Nijimura

The father of the Nijimura brothers is a minor character featured in Part IV: Diamond is Unbreakable.

Crippled and deformed by one of Dio's implants after his death, he is cared for by Keicho and Okuyasu Nijimura.

Appearance
Nijimura Sr. is a short, rotund creature with rough, blistered skin, no ears, and something resembling a beak for his nose and mouth.

Before his deformation, as seen in a photograph, he was a man of masculine features and short, dark hair, wearing a genial expression.

Personality
Nijimura Sr. is unable to communicate above a basic, animalistic level.

His sons are originally frustrated by his apparently meaningless habit of searching a chest in his room. Restoring the objects there, Josuke is able to reveal that he had been searching for a photograph of himself and his young family.

Abilities

 * See also List of Unnamed Stands.

It is suggested that Nijimura's survival is maintained in part by a formerly more pronounced Stand ability.

He seems effectively immortal; his limbs regrowing when removed.

History
Twelve years prior to Diamond is Unbreakable, the Nijimura family's matriarch died, leaving the father in depression. On top of that, Japan had been going through a tough time economically and the family soon fell into poverty. The father constantly abused his sons as a result.

Two years later, the patriarch started to receive letters with money and jewels. Much later in his life, his older son Keicho would realize his father had sold his soul and heart to Dio Brando, who, at that time, was scouring the globe for a stand user capable of recreating reality.

Dio, however, distrusted the Nijimura patriarch and implanted a seed of his undead body within him. When Jotaro defeated Dio, and when his younger son Okuyasu was only 7, the seed burst, causing the father to slowly mutate into a monstrous form, and later lose his ability to speak. This form would automatically heal any wounds inflicted. Keicho subsequently searched for a means to end his father's miserable life.

Diamond is Unbreakable
The Nijimura patriarch is first introduced as a bestial, unintelligent creature. It is kept on a chain and searches feverishly through a box for his family's photograph. However, Keicho misinterprets the action as mere insanity and angrily beats his mutated father for that reason. Only when Josuke examines the contents of the box and pieces the photograph back together is the patriarch finally pacified.

Later in the series, Okuyasu is seen attending his father when they meet with Josuke to discuss Yoshikage Kira's actions and to look after one another in case any of them may be assaulted. At the end of the series, the Nijimura patriarch is seen adopting Stray Cat and bonding with his new pet.