Chizuo

Chizuo was the maternal grandfather of Tenko Shimura and Hana Shimura, the father of Nao Shimura, and husband of Mako.

He died when his grandson's Quirk went out of control.

Appearance
Chizuo was a relatively chubby and large elderly man. He had the same hair color as his daughter.

Personality
Chizuo was a loving and caring man who loved all of his family dearly. He was kind-hearted, as he is shown offering his grandson sweets to try and cheer him up. However, despite his caring nature, Chizuo is disgusted of how his son-in-law treats his children to admire and talk about Heroes. It is implied that he is aware of her son-in-law's mother, Nana Shimura, being a Hero, but Kotaro does not want to do anything about her since he believes that she abandoned him for the sake of others. Despite how much he hates the abuse, Mako was hesitant of talking to her son-in-law of treating her grandchildren with animosity out of fear that he will kick him and his wife out.

While he did not intervene, he did join his wife and daughter in confronting Kotaro, wanting to end the abuse for good. When Kotaro physically punished Tenko in anger; however, Chizuo and the rest of the family knows Kotaro crossed the line and joined his daughter and wife in confronting his son-in-law, wanting to put an end to the abuse.

Unfortunately, his kindness and good nature was not enough to prevent Tenko's growing frustration and hatred, and that lead to him and his family being killed when the boy's Quirk spiralled out of control.

History
Chizuo and wife, Mako, lived in the house of their daughter, Nao, and his son-in-law, Kotaro, who permitted them to have an everyday role in their grandchildren's lives. Although Chizuo spent everyday with his family, he was disgusted by the abuse Kotaro subjected his son, Tenko, to for liking heroes. Everyday, he keeps witnessing Kotaro's abuse growing more violent, especially when Kotaro kicked Tenko out in the backyard to make him sleep for thenight all because he was playing Hero with others. Mako asks Kotaro if he's being too strict to his children about liking Heroes.

Although Kotaro agreed, he still lamented on Tenko being unable to develop a Quirk despite being five years-old, and tells Chizuo and his wife they need to understand the misery of Heroes.

Later, after Chizuo offered his grandson sweets to try and cheer him up, Tenko and Hana end up digging into their father's private studies and peeks into the picture of his mother, Nana Shimura. However, when Kotaro discovered they went in his office, Hana said it was Tenko out of fear of being abused by him. Chizuo and the rest of the family watched as Kotaro took his anger out on Tenko. Later that night, Chizuo and rest of the family have had enough of Kotaro's abuse and came with his daughter and wife to confront him. Kotaro admits he went too far beating his son, his wife telling him that she is done with his rules if he is going to resort to violence, and she asks him if he didn't want to build a happy family. He replies that it wasn't supposed to be that way.

Unfortunately, their actions to intervene came too late and would have severe consequences on Tenko. That night, Tenko's Decay Quirk manifested, and he ended up killing the family dog. When Hana came to apologize to Tenko, she screams in horror and is accidentally killed as well after he tries to get her to help him.

Chizuo, his wife, and daughter appeared after they heard Hana's scream and came to the backyard, only to be horrified after witnessing Tenko killing his sister. Begging for help, Tenko tries to reach his mother, but he touches the ground and his decay spreads, accidentally slaughtering them all in the process before being finally broken, killing his father with Decay and destroying the house. All that remained of Chizuo was his hands, which were recovered by All For One and Tenko added them to his villain costume after he became Tomura Shigaraki.

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, culminating in a shadowy version of All For One appearing before him. 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

 * Chizuo's name is comprised of three kanji with "thousand" (千), "haven" (津), and "husband" (夫).

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