Jack's father looks like an older version of his son. He has his son's rectangular head, hair style (his hair is gray but black in his younger years), and eyes, & he has a mustache (color's are the same as hair that differ from age), but there are subtle differences, like his father has a more light hearted expression compared to his son's stern look.Old samurai
Though he had little screen time, Jack's father's personality is very similar to his son. He is a kind, modest, and wise man who was loved by his people, especially his wife and son, who were the most important things to him.
Before Jack was born, his father had been pulled into the great battle against Aku, a shape-shifting sorcerer. Despite having a powerful army, he didn't stand a chance against the sorcerer and his forces were destroyed. Just as all hope seemed lost, the gods Odin, Ra, and Vishnu bestowed Jack's father a mystical sword that could harm Aku, but could only be wielded by one pure of heart. The sword accepted him and with it, Jack's father defeated Aku and brought peace to the land just as his baby son was born.Father meets son.
Years later, with Jack now as a young child, Aku awakened from his prison and attacked the land once again, but this time he captured Jack's father before he could retrieve his sword. Before he was taken away, Jack's father asked his wife to take care their child and help him become the next hero who would defeat Aku; this time forever.
After years of training, Jack soon found his father, now a decrepit and weakened old man. He told his son that the sword he wields is only a tool and it is only as powerful as the one who wields it.
Master swordsman: Jack's father was a powerful samurai who in the prime of his youth was able to fight and defeat Aku with the sword he obtained from the gods, and had a mastery of the sword that was on par with Jack.Jack's father empowered by the newly forged sword.