Enji Todoroki/Relationships

Rei Todoroki
Rei is Enji's wife. Endeavor bought her family over to marry her through a Quirk marriage. It's revealed that he chose her because of how her ice Quirk counters the drawbacks of his Hellflame Quirk. Despite his reasons for marrying her, he did show some feelings for her when they first met, as he described her as a strong person who could melt at the slightest touch. The fact that he also remembered her favorite flowers even though she mentioned it once during that time shows how much he cared about her at the beginning.

As shown in his memories, Enji initially had a much healthier relationship with his wife during the first few years of their marriage. This is seen where he was genuinely happy when raising and training Toya's Quirk when it was evident that it possessed superior firepower to his own and was happy upon the birth of their second daughter Fuyumi despite her not having the Quirk he hoped for. Later, Enji revealed that he never forced Rei to have more children against her will to create his ideal heir and she herself genuinely wanted more due to believing that they could encourage each other.

However, the relationship between them started to sour when Toya's stubbornness prevented him from stopping from training and subsequently burning himself, leading to Enji's decision to have more kids so he would be forced to give up. After Natsuo and Shoto were born, Enji's obsession to overcome All Might led him to train Shoto only while neglecting the others. Despite Rei telling him that all Toya wanted was to be acknowledged, he responded that all he can show is the world of Heroes but she accused him of running away, something he would admit to be true to Natsuo years later. When he started training Shoto when he was still very young, his wife tried to stop him, but Enji refused to listen and told her to stay out of his way, smacking her around when she interfered with the training of Shoto. At one point when he caught Toya with burns on his stomach, he got angry with Rei and hit her for not stopping him despite having told her to keep her eyes on him.

Enji's and Rei's relationship deteriorated to the point of constant abuse of her and their children, and Enji's behavior became so bad that Rei couldn't stand the sight of him. Rei eventually had a mental breakdown and she ended up hurting Shoto. After this incident, Enji put her away in an institution.

In the present, Enji has actually visited his wife at the hospital often, and though he hasn't seen her face to face, he would leave the flower that she told him she liked when they first met as a gift. After Enji was forced to become Number 1 Hero after All Might retired he eventually realized the damage he has done to his family due to his behavior, after which he tries by all means to fix the situation with his family, accepting the possibility that they can never forgive him.

Finally, he concludes that in order for Rei and their children to be happy, he plans to have Fuyumi, Natsuo, and Shoto move in with their mom in a new house built in a more convenient location and has more or less cut himself out of their lives.

After seeing Toya's broadcast and the truth about their family exposed, Enji was surprised when Rei comes to visit him after the Paranormal Liberation War along with Fuyumi and Natsuo. When he expresses the feelings in his heart, Rei interjects and asks him what he's referring to, stating that the rest of his family has carried the same emotions he has for much longer than him. When asked what she was doing there, Rei explains that she came to discuss their family and Toya, carrying the flower he'd given to her before.

Having confronted the truth that Toya's descent into madness was the result of their failures as parents - Enji for having lit the fires of Toya's ambitions and desires for validation from his obsessive and driven father and Rei for having failed to provide for him and see him for what he was becoming, Enji tearfully wondered if the strong woman standing before him was the woman he married as Rei told him that he would have to confront their renegade first-born son and stop him, reaffirming the affection and admiration he held for his wife.

Toya Todoroki
Originally, his oldest son Toya was supposed to be his successor because his fire Quirk gave him flames more powerful than even Endeavor's. As such, Endeavor tried to train him and teach him one of his secret techniques. He seemed to not push Toya through the same ruthless training he would later do with Shoto, and in return Toya was excited to learn his father's ultimate move and surpass All Might. Unfortunately, Toya inherited his mother's weaker constitution which prevented him from improving it. Seeing this, Endeavor tried to stop training Toya but due to him inheriting his stubbornness, Toya continuously trained himself regardless of the burn scars he got. This behavior ultimately led to the birth of Natsuo and Shoto in an attempt to force him to give up, but all it did was make Toya even more determined to prove himself and be acknowledged. At one point, Endeavor told Toya to live a life beyond that of a Hero, but Toya told him that it is because he lit the fire in him to surpass All Might that he can't quit.

One day, after Toya broke down and almost attacked Shoto as an infant, Endeavor chose to seclude his youngest son from his other siblings while asking Rei to keep her eye on Toya. Endeavor claimed he felt he could only show Toya the world of a Hero but Rei felt he was running away, a statement he would confess to Natsuo years later. Endeavor's neglectful treatment of his eldest son was what ultimately drove him to train at Sekoto Peak, resulting in him incinerating his body and disappearing; he would reveal that the reason he chose not to go to Sekoto Peak with Toya was because he had no idea what to say to him to make him feel better. At first, Enji appeared to show no guilt about this accident, but in actuality he bore much anger at himself for what happened. His flashback showed Enji looking at the burning Sekoto Peak while shouting in absolute horror. Recently, it has been shown that he acknowledges that it's his fault for Toya's fate and that the supposed death of his eldest son was something Enji can never forgive himself for. Enji usually prays at Toya's  Buddhist altar in his home and wishes he was here. While hiding in the shadows, Toya having renamed himself Dabi, had secretly watched Endeavor's actions from afar, planning to extract his vengeance on him for the torment he went through.

Many years later, Dabi eventually confronted Endeavor after the hero defeated High-End. Dabi greeted him and was amused by the latter's unfamiliarity with him while he seemed to know a lot about him. Dabi earned his father's disgust after he callously disregarded the murder of Snatch. Dabi tried to attack the weakened Endeavor but decided to retreat once Mirko appeared on the scene, though he told his father that they would meet again while angrily calling him by his real name. He would later send Starservant and Ending to make Endeavor suffer even more than before.

By the time the Paranormal Liberation War occurs, Dabi gleefully reveals his true identity as Toya to Endeavor upon reaching their location on Gigantomachia. He also reveals everything about Endeavor's past to public eye out of pure hatred for his father. This deeply shocks Endeavor to point of feeling devastated to see his oldest child as a villain. Dabi also admits wanting to make Endeavor suffer for the rest of his life, believing he doesn't deserve any redemption for his past sins. For these reasons, Dabi ultimately desires to kill and put an end to his father. Upon learning the truth about his oldest son being alive, he initially refuses to believe it, claiming that Dabi is telling a despicable lie, but Endeavor is forced to accept the reality of what Toya had become. The shock of this revelation is so great that he is unable to move or do anything as Dabi prepares to attack Endeavor and the others, only able to think of how he'd initially believed his oldest son to still be alive and searched for him.

After regaining consciousness in the hospital recovering, Enji was shown to greatly lament his previous abusive treatment towards Toya and began fully remembering the pain and agony he put him through and now feeling immense guilt for everything he did in the past. Enji himself admitted that despite his eldest son now being a mass murderer, he couldn't fight against him. However, after talking with his wife and the reassurance he receives from Shoto and the rest of his family, Enji tearfully accepts the burden of responsibility and chooses to deal with Toya with the rest of his family, as well as Hawks and Best Jeanist.

Fuyumi Todoroki
As seen in his memories, despite Fuyumi not having the Quirk he desired, he was nonetheless happy when she was born and revealed that during the time Fuyumi was born and Toya was still young, it was one of the happiest times of the Todoroki family and one the most stable times for them. Eventually, as with her brothers Toya and Natsuo, Endeavor ultimately neglected her. Despite this, Fuyumi is the only child who is more able to look past their father's faults and forgive him for his previous behavior, especially since her father was trying to atone for his mistakes and be a better person. Fuyumi is more than aware of how messed up her family turned out because of Endeavor's abuse while expressing some fear of it, but she is the one who supports Enji the most in his effort to improve and fix his family issues.

Fuyumi goes out of her way to help her father mend his relationship with her brothers, so in this way, they can be a normal family. Although her initiatives have not yet been very successful, Enji thanks his daughter for all the support she has given him, thinking that Fuyumi doesn't know how much he has been saved by her.

When he leaves with the boys, he once more thanks Fuyumi who only responds to his gratitude with a smile. Endeavor later revealed that he is building a new house for his children and their mother, while he remains at their house alone.

When he sees her visiting him at the hospital, Fuyumi was concerned and asked her father why he was crying. He replied by apologizing for everything he did to her. After reminiscing of Toya and the events that made him become a villain, Fuyumi stated that she had a role in Toya's descent into villainy because of her fear at not saying anything. She offers to be there with the rest of the family to help her father stop Dabi.

Natsuo Todoroki
As with his sister, for years Enji neglected his second son Natsuo due to not inheriting a powerful Quirk to surpass All Might. Enji deemed him a failure and did not put much thought into his upbringing. This is why Natsuo even mentions that he hardly remembers his father.

After regretting his previous behavior towards his family, Enji is more than willing to do everything possible to amend his mistakes towards them, although he is perfectly aware that his son detests him, and he knows that his hatred towards him is more than justified. Enji tells Natsuo he will change his ways, but Natsuo cannot accept this sudden change and has no problem with letting out everything he thinks of Enji to him, which includes his full anger about the fact that Fuyumi and himself were neglected, the abuse he put his mother and Shoto through, and being the main cause for Toya's demise.

He still feels the need to try and reconnect with them as he has his daughter arrange a dinner for Shoto and his friends. During the dinner, he and Natsuo are still on tense terms, despite Fuyumi's attempts to mend it. Natsuo decides to leave earlier so as not to be in the same room as his father. Shortly after leaving dinner, Natsuo is captured by Ending, a criminal who wants Endeavor to kill him. By putting his child in danger, Endeavor freezes because he's traumatized by the look on Natsuo's face. Fortunately, Shoto, Izuku, and Katsuki manage to defeat Ending and rescue Natsuo.

Endeavor embraces Natsuo, grateful that his son's life is safe. As Natsuo breaks free of Endeavor's grasp, Endeavor confesses that he is regretful for what he did to the family due to his negligence and the damage caused accordingly. Natsuo tells his father he doesn't care and declares that, unlike his mother, Shoto, and Fuyumi, he is unable to forgive him. Endeavor responds that he sees Natsuo as kind enough and states that it's okay if Natsuo doesn't forgive him because he's not looking for it, he just wants to atone for his mistakes.

Crying, Natsuo questions why he has to be the only one to try and proactively change and what exactly will Endeavor do to atone. Later, Enji confesses he will have a new house for him, Fuyumi, and their mother, as he realizes that the only thing he can do to help his family is to take himself out of the equation.

After his family comes to visit him in the hospital after the Paranormal Liberation War, Enji sincerely apologizes to Natsuo and the rest of his family for everything that ruined their family. While Natsuo says Enji is the root cause for Toya's descent into villainy, Natsuo also takes some responsibility for not acting and speaking to his father when he was younger and offers to help his father stop Toya. Then, when Hawks and Best Jeanist arrive and lend their aid, as he watches his father cry again, Natsuo reminds Enji that he's only helping until Toya is stopped, showing he's still unwilling to forgive his father, but Enji is nevertheless grateful and continues crying while replying that he understands.

Shoto Todoroki
Enji is Shoto's father. Their relationship initially started out poor: Shoto grew up experiencing his father's abuse not only towards him but also his mother. As explained during the Sports Festival, Enji regarded Shoto merely as a tool to surpass All Might, because Shoto possesses a perfect mix of both his parents' Quirks, something his other children do not. As a result, Enji put Shoto through ruthless training, which caused Shoto a severe degree of physical and emotional pain. Shoto, harboring a bitter hatred towards his father on account of this, as well as the abuse towards his mother, refused to use his fire powers in battle until Izuku Midoriya reminded him of his mother's encouragement.

After Shoto used his flames in battle, Enji was visibly excited, although Shoto still made clear to him that they were not on good terms. Nevertheless, Shoto accepted his father's field training offer, showing that he realizes his father's success as a Hero.

Enji later expressed pride in his son after he succeeded in his Hero license exam - he called him his son, not his tool, as he had previously done. Enji tried to pat his son on the head, though Shoto gave him the cold shoulder. Undeterred by this rejection, Enji simply told his son he would try to be a better hero and man that Shoto could be proud of. Shoto simply shrugged him off but smiled to himself in response.

Enji and Shoto met again after his battle with High-End; Shoto brought up Enji's scar and spoke rather tensely to him. Once Natsuo confronted Enji and left, Shoto spoke up and called him a great hero after his success. Enji was surprised and listened as Shoto voiced while he hasn't forgiven him yet, he sees the changes he is making while looking forward to seeing what man he would become.

A sign of Enji trying to improve his relationship with Shoto is when he tries to contact him on his phone to teach him a new move while reflecting on how he treated him in the past and how he wants to support his son on the path he has chosen.

Fuyumi organized a family dinner to which she invited Izuku and Katsuki as well. Unfortunately, dinner does not end too well due to family drama. Despite this, Izuku tells Shoto that he feels he's getting ready to forgive Endeavor, as he feels that if Shoto truly hated him, it would be fine to not forgive him, but Izuku voices his thoughts on that Shoto is a very kind person waiting for the right moment.

In the aftermath of the Paranormal Liberation War, upon seeing his son entering his hospital room, Enji calls out to him with tears in his eyes, and profusely apologizes to Shoto and the rest of his family for everything he did. After Enji and Rei finish recollecting on the past and the events that led to Toya becoming the villain "Dabi", Shoto expresses that he initially thought he had to deal with Toya alone, but after talking with Rei, decides to help stop Toya as a family. Shoto extends a hand to his father, offering to help him back up once he's finished grieving, causing Enji to sob uncontrollably at the support Shoto is giving him, calling out his name in appreciation.

All Might
Ten years before the start of the series, Toshinori once had a talk with Endeavor and since then, they have not spoken to each other. It appears that Endeavor has an intense rivalry with Toshinori (one-sided on Endeavor's side as Toshinori tries to be friendly with him). This rivalry with Toshinori is so great that Endeavor decided to have a child that would be able to surpass All Might. Endeavor despises Toshinori's "easy breezy little attitude", finding it to be annoying. Despite his antagonism to All Might, Endeavor does have a begrudging sense of respect for his skills and strength.

However, upon learning and seeing his true form, Endeavor was furious that his rival's true form was so meek and small. His disdain of All Might only intensified after the latter retired as a Pro Hero and Endeavor would be given the No. 1 spot, which he always wanted but furiously refuses it, due to the fact he did not earn it nor does he feel he deserves it.

Despite this, he is not incapable of showing All Might respect, as he thanked All Might for bringing his son back to him. He sincerely asked him later how he was such a capable Symbol of Peace.

Hawks
Other than his sidekicks, Hawks is Endeavor's closest ally. Hawks looked up to Endeavor as a child because he was the only one trying to surpass All Might. At the Hero Billboard Chart event, Hawks called out Endeavor as a way to fire him up. Afterward, Endeavor was very annoyed with the young Winged Hero and confronted him about his snarky attitude. Hawks explained his motives and asked for Endeavor's help investigating sightings of Nomus in Kyushu.

While in Hawks' hometown, Endeavor learned why Hawks wants to be a hero and his goals to make heroes' lives easier. They were interrupted when High-End attacked, but thanks to Hawks' aid Endeavor was able to prevail and prove he's truly the No. 1 Hero.

After successfully infiltrating the Paranormal Liberation Front, Hawks was unable to send any clear messages to any allies. In order to properly prepare the heroes, Hawks put all his faith in Endeavor. He counted on the fact that Endeavor would notice his personality change when he came to Endeavor's town to "spread the good word of the Meta Liberation Army". Due to their relationship Endeavor immediately noticed Hawks was acting very differently than usual.

Thanks to this, Endeavor was able to decipher a hidden message Hawks left in a copy of Meta Liberation War given to him. Endeavor very clearly trusts Hawks and did exactly as the Winged Hero instructed. The Flame Hero prepared the next generation and organized the heroes to stop the Paranormal Liberation Front before they take over the world.

Just as the operation began, Endeavor confirms for himself that he's done everything Hawks has asked of him. This shows that the two have a strong bond of trust and respect between them. It is thanks to their bond that the heroes ever stood a chance against the villain alliance.

When Hawks visits Endeavor in the hospital after the Paranormal Liberation War, he is surprised at his unexpected visit. Hawks explains the situation going on in society and the utter chaos that is ensuing, but when Hawks offers help to Endeavor, he is shocked and confused at why Hawks would choose to aid him. Regardless, Endeavor is extremely thankful for Hawks' support, and when he asks the number one hero if he can stand up and move forward, tears return to his eyes as he replies that he can, happy to know that he won't have to fight alone.

Izuku Midoriya
Endeavor first meets Izuku during the U.A. Sports Festival before his fight with Shoto. He commented on how his power was similar to All Might's and that it's Shoto's duty to surpass All Might, so Izuku shouldn't fight pitifully in front of him. Thinking back to what Shoto told him about his past, Izuku tells Endeavor that he isn't All Might and that Shoto isn't him either, annoying the Pro Hero.

The two meet again when Endeavor accepts him and Katsuki as interns for the second Hero Work Studies under Shoto's suggestion. Izuku notes that the atmosphere he had back then was different from the one he had now. Endeavor, in turn, recalls what Izuku told him back at the festival on how Shoto wasn't him.

Endeavor initially didn't want to train him and Katsuki, but after receiving Hawks' coded message, he decides to train them. After he hears about the complications of Izuku's Quirk and it's new power, he comments on how the both of them are burdened with difficult Quirks, leaving him confused.

Endeavor thanks Izuku and his other two Interns for saving the life of his son Natsuo.

While watching Izuku and Tomura fight, Endeavor felt pathetic for his inability to do anything even though he is the No. 1 Hero. Later, when Dabi scolds Izuku for intervening in a 'family matter' while he was attacking Shoto, the he tells Dabi that Endeavor's mentoring made him stronger. Izuku acknowledges that while he is aware of Endeavor's crimes, he still watches him with confidence that Endeavor can change, and tells Dabi that he isn't Endeavor. Izuku's words end up causing Endeavor to tear up over Izuku's belief in him, and what gives him the strength to snap back to his senses and use his remaining power to strike Gigantomachia before passing out.

Katsuki Bakugo
Endeavor met Katsuki when he and Izuku were invited by Shoto to be trained by his father. This is something he did not like because he would have preferred Shoto to come alone and didn't hesitate to let them know. As a result, Katsuki has no problem bluntly telling Endeavor that he is a jerk, although he says he will put up with it if that means he can see how the top hero operates. Katsuki's attitude displeases Endeavor and he asks Shoto if he really is his friend.

Despite his initial refusal, Endeavor also decides to train Katsuki and Izuku in addition to his son. During training, he does not hesitate to recognize that Katsuki has potential, although he does not accept excuses from him for being too slow, so he gives him some advice to improve his skills.

Despite their rocky interactions, Endeavor is grateful to Katsuki that, along with Izuku and Shoto, he rescued his son Natsuo from Ending.

Hiroshi Tameda
Enji meets Hiroshi Tameda while walking with Hawks in Kyushu after the JP Hero Billboard Chart announcements where he notices him and his friends telling him to get an autograph. Enji approaches Hiroshi and offers his hand to shake, only to be taken aback when Hiroshi freaks out by his new behavior and listening to the fan say that Endeavor is cool when he doesn't try to indulge in fanservice, leaving the hero questioning his style of approach.

After Endeavor's fight with Hood, Enji returned home to his children. After listening to Natsuo's rant about his out-of-the-blue change and him leaving the room, he sees on the news what Hiroshi said to the press to keep supporting Endeavor's fight. This causes Enji to realize how much Hiroshi's support meant to him, and what inspires him to secure a future for the next generation.