|Nickname||The Monsters Monster|
|First Appearance(Manga)||Koukou Tekkenden Tough Chapter :|
|Family||Seiko Miyazawa (Twin-Brother)
Yumiko Miyazawa (Older Sister)
Son-O (Older Brother)
Kichi Miyazawa (Nephew)
Marcio Naito (Son)
Various unnamed children
One of the main antagonists of the series, Kiryu is considered as the incarnation of the devil by anyone who has met him. He is more of an anti-hero type as he constantly pushes Kibo to surpass his limits.
Unlike his brother, Kiryu is wicked and completely ruthless.
Kiryu looks almost exactly like Seiko, since they are identical twins. The only exception being that Kiryu has slicked back hair, a scar across his face and he doesn't wear glasses.
In the side story Tankōbon "Oton", it is revealed that Kiryu fathered a child with the daughter of the United States President