About Masked Rider Leangle

Masked Rider Leangle is the fourth and final Rider to appear in the Masked Rider Blade TV series. The Leangle system was developed through tricks and manipulation by Isaka, the Peacock Undead (otherwise known as the Category Jack of Diamonds). In his Ace form, Leangle is the strongest rider in the series. Although initially afraid of the dark when fighting the Mole Undead, Mutsuki overcame his fear when he saw the smiles on the peoples' faces he rescued.
Masked Rider Leangle is Mutsuki Kamijō, a troubled teenage highschool boy who was selected to become Leangle by the evil will of the Spider Undead (Category Ace of Clubs). He is played by Takahiro Hōjō.
Mutsuki's high-class Undead seem to be the kindest of all the high-class Royals. His Category King is a pacifist, his Category Queen has strong sense of honor and loyalty, and his Category Jack is really laid back, and sometimes lazy, only fighting to defend himself. All of them tend not to fight, unless it was necessary. And with the help of his Category King and Queen, only then he is able to suppress the power of the Spider Undead and properly seal him.
Some look at Mutsuki's transformation into the Tarantula Undead's form as his King form. Unlike Blade and Garren, he gets no Jack form, but unseals him to aid him in battle against the Keroberos Undead.