
Nagisa's Father is the estranged husband of Hiromi Shiota and the father of the protagonist, a management consultant whose name is never revealed. He left the family years earlier, worn down by his wife's temper, yet keeps a quiet affection for his son.
He keeps his light hair short, a grayish blue much like his son's, though the anime's second season darkens it toward black and gives him black eyes.
A composed man, Nagisa's father carries clear guilt over having walked out on his son, yet his fondness for the boy plainly remains, shown in small gestures like treating him to sushi.
Little of his history is recorded beyond his marriage to Hiromi Shiota, which he abandoned while Nagisa was still young, unable to endure the constant fighting. He resurfaces sharing a sushi meal with his son after the island trip, gently asking how the boy copes under his mother's severity and noting with relief that Nagisa seems to be doing better. He appears again at the graduation, where he and Hiromi announce that they mean to give their marriage another chance. He also reveals that Korosensei had approached him a month earlier, explaining that Nagisa had asked to go by his first name so a return to the family name would come easily should his parents ever reconcile.

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Nagisa's Father is the estranged husband of Hiromi Shiota and the father of protagonist Nagisa Shiota. His name is never revealed in the series, and he works as a management consultant.
Nagisa's Father left the family years earlier because he was unable to endure his wife Hiromi's constant fighting and severe temper, though he still carries guilt over abandoning his son.
Nagisa's Father is estranged from Hiromi Shiota for most of the series, having left the marriage due to her constant fighting, but the two later announce at Nagisa's graduation that they intend to give their marriage another chance.
Nagisa's Father works as a management consultant.
Yes. Nagisa's Father and Hiromi Shiota appear together at Nagisa's graduation, where they announce they mean to give their marriage another chance.
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