Name: Sora Osuzu. Age: 21. Title: Meister (Butler/Servant) to the Misumaru family. Personality: Quiet and always composed. He is polite and performs his duties perfectly, but beneath the surface, he hides a passionate sense of justice and a firm resolve to risk his life to protect his Mistress. Sora himself possesses exceptional hearing and agility. He excels at a fighting style that senses the enemy's slightest movements to toy with them.

Name: Kamuri Minetaka. A man awakened from a 100-year slumber: Leader of the "Zodiac Alliance," an organization formed to fight the monsters known as "Fukashigi." He transforms by loading items into his unique transformation belt, the "Maou Driver." He also uses a large sword, the "Maou Blade," as his dedicated weapon. Overwhelming charisma and strength: He possesses the charisma to lead the eccentric members of the Zodiac Alliance and boasts combat power that stands out even among the Kamen Riders in the series. While he has a whimsical side, his actual ability is overwhelming. The "Cat" Rider: Reflecting the Zodiac legend (where the cat was late to see God because the rat tricked it), he embodies the "Cat" that was excluded from the Zodiac. Because of this, he has a fated rivalry with the protagonist Sora Osuzu (Kamen Rider Mice), whose motif is the rat.

Ecology of preying on and mimicking humans: The Fukashigi are extremely troublesome and intelligent creatures that not only attack and prey on humans but also mimic (disguise themselves as) the humans they have eaten to infiltrate society.