Gender: Female

Family: Enji Todoroki (ex-husband) Toya Todoroki (oldest son; deceased) Fuyumi Todoroki (daughter) Natsuo Todoroki (middle son) Shoto Todoroki (youngest son) Geten (relative)

Appearance: Rei is a middle-aged woman with an average height and build. She has straight shoulder-length white hair with rather long, nose length bangs parted three times, leaving two pieces on the sides and one in the middle of her face, similar to her daughter and youngest son. Her face has round features, having mellow expressions in casual situations. Her tired-looking eyes are gray with reasonably long eyelashes. Rei was shown to have shorter hair and lighter eyes in the past.

Wearing various civilian clothes, Rei favors plain colors and patterns, such as a yellow jumper and orange t-shirt.

Personality: In her younger years, Rei was a stoic woman who was described by Enji to be like ice herself. Despite this, there were some things that could make her smile such as seeing her favorite flower. Rei was aware that Enji's proposition for them to marry was a Quirk Marriage, but agreed for her family's sake so Enji could help them financially, demonstrating the love she held for them. While Rei's options were limited, she maintained a hopeful attitude upon choosing to marry Enji, believing that if she kept smiling it would all work out. Rei would come to be a kind, caring, and loving mother towards her children. She loved her eldest son Toya and wanted to stop him from training his Quirk, knowing the harm it was causing him. Sadly, Rei's love and concern was not enough to help Toya see through his obsession with becoming a Hero and gaining his father's approval. She was also devastated by Toya's supposed death, despite her son cruelly blaming her for his birth. She was also loving and protective of her youngest son, Shoto, and would try to stop her husband from forcing his mad training methods on him. While Shoto suffered from Enji's cruelty, Rei comforted him and encouraged the boy to become the person he wants to be, saying that he isn't bound by his father's blood, further showing her kind nature.

However, the constant abuse that she received from her husband caused her to become mentally unstable. This is seen where Rei admitted that she was slowly becoming repulsed by her own children due to her seeing their resemblance to her husband in them. Eventually, she became unstable to the point that one day she finally snapped upon seeing Shoto's left side, which reminded her of Enji. This caused her to pour a kettle of boiling water she had near her over her son's face, burning him. She did not, however, do this out of hatred for Shoto, but rather due to her mental instability and it is later revealed that after doing so, she immediately attempted to soothe her son's burns using her ice Quirk, while hysterically apologizing to him and asking herself why she did it. After staying at a psychiatric ward in Fujitani Hospital and being away from her husband, Rei has shown to have returned to her past kind, caring self. Upon meeting her son again, she apologized and smiled through tears after he tells her that he forgave her, and the two restored their loving relationship. She also receives visits from her other children, Natsuo and Fuyumi, and appears to receive small gifts from her husband, although she is yet to see him face to face out of fear. Her kindness and compassion is shown when she understands the internal struggle Enji is facing, and from this, Natsuo is able to understand that Rei has faith in him despite all of the trauma he put her through, but even then, she wished to divorce Enji order to finally free her from the lingering abuse, still wishing to help Enji, but as a friend, no longer as a wife.

Despite her kind nature, Rei is surprisingly strong-willed. After having seen her eldest son's broadcast and learning the truth that Toya was alive and had become a mass murderer, instead of breaking down, she resolves to address the situation with the rest of her family, including her youngest son and her husband. She went to the hospital where her ex-husband and youngest son were being treated, and when Enji was expressing his guilt and shedding tears, Rei approached him and reminded him that the rest of their family suffered from these feelings more than he has, explaining to Enji that she came to talk about their family and about Toya. Despite her anger towards her ex-husband for what she and her children went through, she also understood that she too had been unable to see how they failed Toya when he was young, a sense of guilt she shares with Enji and a burden that she pointed out is not his alone.

Due to her recovery and reclaiming her sanity, Rei has shown to be a forgiving and understanding woman, determined to do what she can to help her husband recover and to put an end to their family's dark legacy in Dabi once and for all.

Abilities Overall Abilities: Despite being born with a powerful Quirk because of her heritage from the Himura family, Rei is an inexperienced woman who doesn't have any particular combat experience or fighting-style techniques unlike her sons, Dabi and Shoto, or her husband, Endeavor. However, she does have some kind of proficiency over the usage of her Quirk, as such when she tries to cool down Shoto's face after she threw boiling hot water over him.

She even demonstrates proficient control of her Quirk as she was able to coat herself in it to reach Endeavor and Dabi through their blazing inferno in time before they flew too far into the air.

Frost: Rei's Quirk gives her the ability to generate and manipulate ice from her body. This ice Quirk is considered very powerful, given that it impressed Enji enough that he wanted an offspring with a combination of this Quirk and his own.

Unlike the Quirk used by Geten, a distant relative of hers, she can generate ice from her body at will. Even though Frost is a powerful Quirk, she cannot use her Quirk for long periods of time as overusing or prolonging it can cause her body to develop frostbites, and her body temperature drops if she pushes it further.

Shoto is a moderately tall and rather muscular young man who is well-built for his age, stemming from his intense training as a child. He has short hair that doesn't pass his neck, and wears bangs, parted twice to avoid obscuring his vision. His hair is evenly split between white on his right side and red on his left, this unusual coloring being due to his Quirk. As another result, whilst his eyes, in shape, are seen as quite thin and reserved, as he also possesses heterochromia iridum, which causes his left eye's iris to appear turquoise, while his right is a dark gray. Additionally, he has a large burn scar on the left side of his face, which reaches from his hairline to halfway down his cheek.

Shoto Todoroki is defined by his "hot and cold" personality. Raised with a traumatic past, he is calm, reserved, and incredibly calculating. However, beneath his aloof exterior, he is deeply compassionate and fiercely protective of his friends.

Half-Cold Half-Hot: This Quirk allows the Shoto to generate ice, frost, and cold from the right side of his body, and fire, flames, and heat from the left. However, Shot is unable to manipulate either element that comes from an external source; they can only create them from his body.