The steel angel Mikhail was created in order to defeat steel angel Kurumi. Mikhail is equipped with not only an angel heart mark II but a first generation angel heart mark I. The two hearts provide Mikhail with power that rivals that of any other single steel angel.

During Japan's Taisho Era (1912-1926), a scientist named Ayanokoji developed the Steel Angel - an artificial humanoid with superhuman physical abilities. While the Imperial Army wanted to use the Steel Angel as a new means of modern warfare, Ayanokoji wanted his creation to be a new step in the future of mankind. Thus, he defied orders from the Army and secretly made the Steel Angel codenamed "Kurumi". Then one day, a young boy named Nakahito Kagura snuck into Ayanokoji's house as a dare by his friends and stumbled upon Kurumi's lifeless body. A sudden attack by the Imperial Army shook the house, causing Kurumi to fall on Nakahito. At that moment, their lips met, and Kurumi woke up from "the kiss that started a miracle".
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(Source: Anime News Network)

Japan, Taisho Era (1912-1926) - A young priest-in-training named Nakahito Kagura stumbles upon a secret laboratory owned by a scientist named Ayanokouji. There, he discovers Kurumi - a Steel Angel originally designed for advanced military combat. Their lips accidentally meet when an attack by the imperial army rocks the facilities. As a result, the kiss awakens Kurumi, who sees Nakahito as her only master. But with the army on their tail and Kurumi's "sisters" Saki and Karinka awakened, Nakahito, Kurumi and Professor Ayanokouji must run for their lives while trying to find out the truth about the Angel Heart - the source of the Steel Angel's power. <br>
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(Source: Anime News Network)