Shizuha was a tall, fair-skinned woman. Like her daughter, she was slender yet noticeably curvaceous and athletic in build with rather large breasts. She had long dark hair that hung just below her waist. She has a hime-style hair cut with her bangs were cut in a short fringe that reached cheek length and framed the sides of her face with some strands hanging between her eyes and thick strands in front of her ears that hung over her shoulders with elegant bands holding them. While part of her hair flowed freely, some of her hair was braided by the nape of her neck and the rest was held in place by a type of spiraling band.
She apparently wore two red hairclips, one that concealed a small knife and the other concealed a lockpick. Normally, Shizuha would wear a long floral kimono. Underneath, she wore a similar tight body outfit similar to the one that Miu currently wears in most situations. In battle, she would also wear gauntlets and similar armor on her shoulders, outer thighs, and legs up to her knees. Like Miu, her hair turns wild when her Ki explodes.
Shizuha was a kind woman who loved her daughter very much and was not afraid to die protecting her. She, like her daughter, was a very brave and selfless woman, caring for others and willing to do anything for the ones she loved. She fell in love with Saiga and he wished for her hand in marriage and wanted to be together with him.
Shizuha was a very modest and noble woman, as, aside from her battle outfit, chose to dress in modest and noble features. She was very embarrassed when she kicked a boulder and showed off her legs too much and tried to cover herself. She also had a bit of a temper, as an embarrassed Shizuha gave Senzui a playful yet forceful punch. This trait would be passed down to her daughter.
While not much has been shown of her overall abilities, Shizuha was recognized as the second strongest fighter ever produced within the Kuremisago Clan. She was shown to an extremely powerful fighter, taking down several members of her own clan with Saiga alone is enough to prove her worth as a fighter. Even Hayato, Saiga's father and the Invincible Superman complimented her skills, which is a testament to her abilities as a martial artist. She is shown to be an incredible, powerful, and skilled martial artist, as seen when she seemingly fought on almost equal footing with the current leader of Yami while still protecting her infant daughter.
- Enhanced Speed: Shizuha had extreme speed for her age, even after giving birth to Miu after some time had passed, she was able to move in a blizzard at such speed all the while dodging several attacks and protecting her daughter with little difficulties despite her taking some injuries.
- Great Combat Knowledge: Being a member of the Kuremisago Clan, Shizuha knew several fighting skills and was very adept in combat.
- Immense Strength: Despite Shizuha's womanly and slender figure, she displayed remarkable strength, capable of destroying a large boulder with a single upward kick.
- Immense Dou Ki: Shizuha, just like her daughter, had an enormous amount of Dou Ki that would burst out of her. Shizuha has full control of her Ki and was capable of using it to the full extent.
Shizuha was born into the Kuremisago Clan, a clan with the sole purpose of matching people with the best genes together, even among her clan Shizuha was revered as a person with the most excellent lineage. Because of her importance to the clan, she was destined to marry the head of the clan, Senzui. However, one day she met Saiga Furinji while on her secluded walks in the mountains observing the birds. Because Saiga is an outsider, members of the clan try to harm him despite Shizuha stating he's her guest. After Senzui tries to fight him, Shizuha stops them both from harming themselves any further by destroying a large boulder with one kick.
She later informs Saiga that Senzui is her fiance, their coupling decided for the sake of creating better fighters for the village. Shizuha adds that the village hates outsiders such as Saiga which causes him to worry. However Shizuha smiles at him mentioning that despite him being an outsider she had fallen for him and the two embrace as the two are unaware that Senzui is seen watching the two from afar.
However, her clan, with their strict views, would never allow her to be with an outsider and feared to place her into the hands of someone too powerful. Saiga from the Furinji Clan believed that it should be permissible for people of the Kuremisago to marry outsiders, gaining support from Shizuha and many other Kuremisago. Others decided to ally to their traditional views and with the head of the clan, causing a feud that divided the Kuremisago. Shizuha fought alongside Saiga and Senzui during the battles between the divided Kuremisago, later marrying Saiga with Hayato's blessings and giving birth to their daughter Miu.
Some time after giving birth to Miu, Saiga, Senzui, and Shizuha (carrying an infant Miu) receive a report that there is a traitor in their ranks, killing nine of their skilled fighters. Shizuha asks for information on the traitor and, although sensing hesitation from the messenger, urges him to continue his report. Eyewitnesses say that the traitor acted and looked like Saiga, and Shizuha dismisses it saying that it was a trap from the opposing side. On a snowy field Shizuha and her fellow warriors are fighting off a group of traditionalist warriors. Shizuha notices that their opponents are fighting better than normal and wonders who is leading them. Shizuha's allies reports that they have sent her letter to her father-in-law and they urge her to leave them and take Miu to safety, living a peaceful life with Saiga as a family. Shizuha declines and stands her ground, saying that she does not want her daughter to be someone who abandons her friends for the sake of her own happiness.
The fighting ends and Shizuha is seen comforting one of her companions who is dying. She hears a shout from enemy reinforcements and is forced to take Miu with her and dodge their gunfire. She places Miu at the base of a tree and promises to protect Miu with her life as she charges towards her two pursuers. She is able to dodge their bullets and attack but one fighter withstands her attack and aims a gun at point-blank range. Shizuha is unable to dodge but she a large flurry of snow blows the fighter away and Saiga is seen to have saved her. She happily approaches her husband for an embrace but it is seen that he had pierced through her with a thrust. Her last thoughts call out to her husband and she reaches out to touch his face and it is revealed that "Saiga" was Senzui in disguise. She died fully aware that her husband never murdered her or her comrades yet tragically was unable to reveal who the real murderer was. Before she died, she left a feather to guide the Elder to her daughter, who she hid in the snow in case she was unable to come back for her. Eventually the Elder made his way to the battlefield. However, by the time he arrived Shizuha had already passed away.
- with Saiga Fūrinji vs Kuremisago agents (win)
- vs. Senzui (loss, was killed)