Kaguya and Yuzuru Yamai | Snowed in

Yamai Kazamachi is the fifth Spirit to appear. However, by the beginning story, the original Yamai has already split apart into two separate Spirits: Kaguya and Yuzuru.

Yamai was originally one Spirit, but for unknown reasons that may be related to her teleportation between dimensions sometime in the past, she was split into two bodies and minds. The original personality of Yamai is now gone, as well as what type of character she used to have is unknown to the split Yamais. The Yamai Sisters have been well known to the people who knew about the existence of Spirits because they often cause a major storm every time they come to Earth.

It was unstated when the Yamai Sisters started fighting, but they have been fighting with each other for quite some time for the sole purpose of deciding the winner as the real Yamai. Their matches range from non-violent to violent for almost 99 battles, with them arriving at 25 wins for each sister and 49 draws. They then decided that the 100th battle would be their final confrontation. Whether out of luck or by chance, the Yamai Sisters encounter Shido while he and his classmates were having a field trip to the southern island; the Yamai Sisters decided that their 100th battle should be whoever can seduce Shido first will be the winner and will be considered as the real Yamai. Thanks to Reine, it was around this time the Yamai Sisters transferred into Shido’s high school and the beginning of both Yamai sisters and Shido's battle to seduce each other.

In reality, both of the Yamai Sisters secretly wanted the other to live, but when they discovered that both of them had the same idea, they stubbornly refuse to live and for the other to die; so in the end, they fought. Thankfully, Shido forcefully interrupted their fight with Tohka's sword, Sandalphon, and gave them a new option for both of them to live and that is for him to seal their power. They pondered on that idea until they finally accepted their wish to live along with each other. Both of them got their power sealed at the same time when they gave Shido a thank-you kiss.

Due to their stable mental state after being sealed, they didn't need to transfer into Shido's classroom, but the one next door to his.

Being identical twins, Kaguya and Yuzuru look almost the same. They both have orange hair, with a long strand on each side of their head ending in a tornado-like twirl. They also have mercury blue eyes and are close to the same height. However, watching carefully, both still have their individual characteristics.

Kaguya Yamai She has "a characteristically delicate body that looked like it would break if hugged too tightly" as described by Shido. Her hair is braided up, and she has a lean figure. She has a determined expression for most of the time. Kaguya's height is stated to be 157 cm, and her three sizes are B79/W56/H81.

Kaguya's Astral Dress is mainly the color purple and has chains on her right hand and foot. The lower half of her body has a half skirt around her waist which drops to the knees and opens around her thighs. As for casual attire, she began wearing the Raizen High School uniform during her first date with Shido and later adopted the full outfit upon enrolling, including the vest. Aside from this, Kaguya is a fan of gothic lolita outfits. While her fashion sense has been noted to have become more mature by the time she entered university, she still prefers black clothes.

Yuzuru Yamai She has "the body of a model" as described by Shido. Her hair is braided in three portions, and she has a curvy figure. She has a vague expression and keeps her eyes half closed for most of the time; simply put, Yuzuru has a poker face. Her height is stated to be 158 cm, and her three sizes are B90/W61/H86.

While her sister's Astral Dress is mainly purple in color, Yuzuru's dress is bluish-purple with a small cape and has chains on her left hand and foot. As for casual attire, she began wearing the Raizen High School uniform during her first date with Shido and later adopted the full outfit upon enrolling, including the vest. Aside from this, in contrast to Kaguya, Yuzuru seems to prefer more mature clothes.

Personality Despite being twins, their personalities are almost complete opposites to each other. However, they still have some things in common, with both having displayed a playful attitude as well as a mutual love for competition and each other.

Kaguya Yamai Outgoing and outspoken, one can say that she is childish or immature. Kaguya appears to suffer from Chūnibyō, often using exaggerated gestures and German words in an attempt to sound cool. However, she is perfectly capable of speaking normally and her act quickly falls apart if even slightly pressed upon, causing her to often be teased by others. She is also weak about sensual matters and is easily embarrassed when they are mentioned.

Yuzuru Yamai She speaks in a robot-like speech pattern, telling the point of her comment before speaking the rest. For example, when asking Shido to explain something, she would say "Confirm; Shido". Also, unlike Kaguya, her speaking patterns are a genuine verbal tic and not just an act. When arguing with Kaguya, she tends to sneer at her and points out the flaws in her arguments. Overall, Yuzuru is the calmer, quieter, and arguably the more mature one of the twins, though she still has her own moments of childishness.

Due to having their Sephira Crystal split in half between each other, both twins share the same powers commanding wind. In terms of speed, they are regarded as the fastest Spirits. After hearing that they were originally one being, Reine theorizes that Kaguya and Yuzuru have their own unique Path that circulates Reiryoku between the two of them. She compares it to the Path which Shido establishes after sealing a Spirit.

Angel: Raphael

Astral Dress: Elohim Tzabaoth

Weapon:

Combined: Bow and Arrow Kaguya: Lance Yuzuru: Pendulum Both of the Yamai Sisters, despite using different weapons; have the power to manipulate wind. They can gracefully control the air currents in order to glide through the sky. At their full power, both of them can easily create a typhoon that can blow away a small island. They also have shown to be able to combine their powers to form a bow and an arrow that is able to pierce through the 's Territory.

Abilities Moves/Attacks:

Kaguya: El Re'em Yuzuru: El Na'ash Combination Attack: El Kanaph. A single decisive blow fired from a combination of the Yamai sisters' individual Angels. Both of their wings combine to form the body of the bow, Yuzuru's pendulum becomes the bowstring, and Kaguya's lance becomes the arrow.