Nao Shimura

Nao Shimura was the wife of Kotaro Shimura and the mother of Tenko and Hana Shimura.

She died when her son's Quirk went out of control and killed her and her family.

Appearance
Nao was a woman in her early thirties who was usually seen with a worried expression on her face. She had light brown eyes as well as hair of the same color which parted in the middle from her face in bangs and uneven waves that grew to her shoulders, and a curvaceous body.

She had numerous clothes in Tomura's flashbacks ranging from a black shirt with jeans to a corduroy skirt.

Personality
Nao was a kind woman who was troubled with the state of her family. While Nao tried to stop her husband, Kotaro, from punishing their son, she would be unable to fully intervene and only pleaded with him not to be too harsh towards Tenko. Nao was still a loving mother towards her children despite this, as she was shown comforting Tenko some time after the incident and had concern for the boy's allergies. She also asked her son if he still wanted to be a hero despite Kotaro's opinion, showing that she wasn't against Heroes or the idea of her son becoming one.

It is indicated that she was aware of Kotaro's past, which is why she did not oppose his rule of not mentioning heroes in their household. Nao also told her son that Kotaro doesn't hate him but knows how difficult being a hero can be, possibly reflecting on her mother-in-law's decision to leave Kotaro in foster care.

Despite this, Nao was not afraid to stand up to her husband when he had gone too far and became violent, confronting him along with her parents after he had physically punished Tenko in a fit of anger, saying that she was done following his rules if he would continue to hurt their children.

However, Nao's love towards her son was not enough to prevent his inner turmoil from worsening as a result of the ongoing abuse. When Tenko's Decay Quirk manifested and went out of control, Nao rushed in to help her son even when her own body had began to crumble and fall apart, proving that she still loved him even when moments away from death.

History
Nao is the only child of Chizuo and Mako. At some point, she married Kotaro and had two children, Hana and Tenko. Kotaro was successful enough to build a big house for their family, and invited Nao's parents to live with them.

One day, Tenko caused some trouble while pretending to be a hero, so Kotaro took him outside as punishment. Nao begged her husband to not get violent but still does nothing as Tenko is taken outside. As dinner was prepared, Nao asked her husband to bring Tenko back inside, noting that his allergies had gotten worse, though she was unsure what he was allergic to. Later, she comforted her son, asking him if he still wanted to be a hero. As Tenko explained the fun he had with his friend, he embraced Nao and asked her why Kotaro hated him. She states that his father didn't hate Tenko, but that he knew how hard it was to be a hero.

When Kotaro discovered that Tenko went into his office, Nao watched with the rest of the family in shock and horror and shouted when Kotaro smacked Tenko across the face. Afterwards, when Kotaro was in his office and looking at the past letters from his mother, Nao and her parents angrily confronted him, telling Kotaro that they were done his rules if he would hurt their children. She reminded Kotaro of what he said, that he wanted to build a happy family.

Nao went back outside with Chizuo and Mako and saw the dead bodies of Hana and their dog while the ground continued to crumble around Tenko. Even as the decay spread to her foot, Nao still reached out for her son in her final act of compassion before she was killed by Tenko's Quirk.

Her disembodied hands were recovered by Kyudai Garaki, alongside the rest of her family's hands, and became a part of her son's villain costume. Her son would eventually be found by All For One, the same villain who killed her mother-in-law, and renamed Tomura Shigaraki, who would be raised to become a villain himself.

Meta Liberation Army Arc
As Tomura faces off against Re-Destro, he is suddenly overwhelmed by the sheer power of his Stress Quirk, forcing him into a corner. As several of the hands on his suit are unknowingly destroyed, Tomura's instincts start to overload, and he begins to remember his old memories. Tomura takes the preserved hand of his father out of his pocket and tells Re-Destro that he is right about him, that he truly exists only to destroy as he begins to remember when he was Tenko.

After remembering his past to the time being alone and being found by All For One, Tomura finds resolve that those helped him become who he really is. Tomura then breaks away from his past trauma by crushing his father's hand. With memories of his past returning, Tomura decides to break free of the shackles of his trauma and deems the hands of his family unnecessary before Tomura gleefully unleashes his full power with nothing holding him back anymore, laughing triumphantly with a desire to destroy anything that stands in his path.

Paranormal Liberation War Arc
Even in death, the memories of the Shimuras continue to linger on within Tomura. As Tomura laid unconscious after his procedure to obtain the All For One Quirk was interrupted by the Heroes, he experienced a warped version of his past. A vision of Nao appears before him, asking if he still wants to be a Hero. She then tells him that his eyes are getting itcher and more ragged, but Tomura, in his Tenko form, tells her that he is fine.

All of his visions culminated in a shadowy version of All For One appearing before him. As Tomura walks forward, constructs of his family desperately try to stop him from following in All For One's footsteps, but Tomura destroys them without hesitation, telling them not to reject who he is.

Final War Arc
After months of recovering from his injuries, Tomura joins the Final War and ends up getting teleported to the U.A. Floating Fortress where the Heroes combat him. With his Quirks erased, his body undergoes a transformation as a result of the Quirk Singularity, due to Tomura's mental deterioration, as Tenko's memories of his family continue to flash through his head. As a result, in his ultimate defense mode where his body is completely covered in hands, his left hand is morphed into a visage of the Shimura family.

It turns out Tomura was using these memories as a way of fighting back against All For One from within in his attempts to take over his body. With its purpose served after Izuku Midoriya pummels his body, and his Quirks returned, Tomura sheds off this defensive skin with his newly returned control and determination.

Chapter Appearances

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Anime Appearances

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Trivia

 * Nao's name is written with the kanji "repair" (直). This is most likely a reference to her wanting to "repair" her family's problems caused by her husband's hatred of heroes.

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