She is the only girl of the four protagonists. Unlike the others, Kei has known about her ARMS her entire life. She was raised by the Bluemen, the organization that combats Egrigori and originally implanted ARMS in the four teens. Kei was raised and trained as an elite soldier. But because many of the Bluemen saw her as a weapon and not a person, Kei grew up extremely lonely, bitter, and even a little vicious. This all changes when Kei meets Ryo and the other ARMS subjects, the only people who truly understand Kei. With them she finally learns true friendship and teamwork. Kei and Hayato seem to be growing closer as time goes on. Whether this will develop into anything remains to be seen.  Kei's ARMS is called the Queen Of Hearts, and is concentrated in her eyes. Kei's ARMS is an array of powerful sensors, including magnification and infrared. Kei can figure out a punch before it is thrown, or a bullet's course before it leaves the barrel, and avoid them. Kei can also activate, enhance, and deactivate the ARMS of her teammates. The Queen of Hearts' nano-machines allow Kei to heal from injuries much faster than a normal human even when not transformed. Kei has nicknamed her nano-machines her "nano-babies". The Queen Of Hearts' final form is a magnificent woman made of light. Kei is still discovering all the abilities of her ARMS. When the Queen of Hearts displayed its ultimate form for the first time in volume 10, it was able to stop and reverse the out of control transformations of the Jabberwock, Knight, and White Rabbit. In Volume 16, the Queen of Hearts evolved to gain the ability "Mirror of Aegis", which appears to be able to reflect an attack with equal or greater power than was used. In volume 18 the Queen of Hearts reveals to Kei that she holds the ultimate endgame weapon of all the ARMS units. She merely has to say the word "Destroy" and all ARMS units that descended from Alice, and even Alice herself, will be permanently deactivated which will also result in the death of all of the hosts including her friends. Whether Kei has the mental strength to actually use this ability is unknown.  - Source (wikipedia) - 

A boy gets involved in an accident when in kindergarten, horribly damaging his arm, but the doctors somehow manage to save it. Now, several years later, his arm seems to be becoming the focus of strange events as it turns out to be more than a normal arm. Meanwhile, a secret organizations is out to get hold of him and the power he possess. 

__Birth Name:__ Izumi Arai (新井泉)

[Profile (81 Produce)](https://www.81produce.co.jp/actor_search/index.php/item?id=237) | [Official blog](https://ameblo.jp/number-373/)

The female half of the musical duo [TWO-MIX](https://anilist.co/staff/102352/).

Married mangaka [Gosho Aoyama](https://anilist.co/staff/97804/) (creator of _Detective Conan_) on her birthday, May 5, in 2005. Later divorced on December 10, 2007.

**Non-Anime Roles:**
• Fu Hua (Honkai Impact 3rd)

Nicole Oliver is a Canadian actor currently residing in Vancouver, BC. She has a Bachelor of Fine Arts degree from York University, and additional training from the British American Drama Academy in Oxford and London. A prominent member of the Union of BC Performers, she served on its executive board (2002-2005), chaired several committees, and continues to be part of the negotiation team during collective bargaining.

From Ryoji Minagawa and Kyoichi Nanatsuki comes a world of nano-machines, cybernetic assassins, powerful telekinetic opponents, and secret organization dedicated to bringing forth the next evolution of humankind. Containing all the best elements of sci-fi, spy fiction, and conspiracy theory stories, Project Arms is about kids whose arms transform into grotesquely deformed super weapons.
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(Source: Viz Media)

The 2nd Chapter continues the story of Ryo Takatsuki and his companions' quest to discover the secret of the mysterious A.R.M.S. they all possess and what the future may hold for them. They now know where the answers lie but to get to them, they must fight a desperate fight of survival against a powerful military corporation that wants their secrets no matter what the cost.<br><br>
(Source: AniDB)

Kei Kuruma