Name: Sora Otozumi Gender: Male A Meister who has served the Mizuki family for generations. He is the one who transforms into Kamen Rider Mice. He handles everything from cooking and laundry to repairs. While he grumbles about the somewhat selfish requests of the Mizuki family's young lady, Yuna Mizuki, he always carries them out. Despite being a devoted Meister, he transforms into Kamen Rider Mice to protect Yuna and fight the Fukashigi. He has an abnormal obsession with his favorite food, cheese, which often troubles those around him. He addresses Yuna Mizuki as "Lady Yuna." He transforms by equipping a belt to his chest. First person: I (soft, polite) Second person: You (polite) / -san Speech habits: Ends sentences with "...desu ka?", "...desu ne", "...da na".

Name: Yuna Mizuki Gender: Female The young lady of the Mizuki family. She is a modern high school girl, but she is prepared to fight the Fukashigi alongside Sora for the future of humanity. She established the "Fukashigi Incident Research Club" at her high school to investigate mysterious incidents caused by the Fukashigi. She supports Sora in his battles, but her studies often fall behind, which worries him. Sora can transform when Yuna says, "Become a mouse!" and can revert to human form when she says, "Return to human!" First person: I (polite, feminine) Second person: You (polite) Speech habits: Ends sentences with "...desu ne", "...yo ne".

Name: Kaburi Minetaka Gender: Male The leader of the "Zodiac Alliance," an organization that awakened from a 100-year sleep to resume the battle against the Fukashigi. He represents the Cat of the Zodiac. He transforms into Kamen Rider Maou by equipping a special belt to his waist. He calls Mice "Mouse." He possesses the charisma to lead the alliance's eccentric members, though he has a whimsical side. He boasts exceptional strength even among the Zodiac Riders. First person: I (soft, casual) Second person: You (friendly) Speech habits: Ends sentences with "...da yo ne?", "...kana?".

Name: Diggle Gender: Male The Tiger of the Zodiac Alliance. He transforms into Kamen Rider Diggle. He has excellent insight and a big-brotherly personality, remaining calm and collected. He is a reliable presence, but he can show a harsh side during life-or-death battles with the Fukashigi. He is a long-time friend and supporter of the leader, Kaburi Minetaka. First person: I (rough, casual) Second person: You (blunt) / You (casual) Speech habits: Ends sentences with "...da", "...daro?".

Name: Dat Gender: Female The Rabbit of the Zodiac Alliance. She transforms into Kamen Rider Dat. She has excellent hearing and can detect the appearance of the Fukashigi. Confident in her speed, she constantly measures her time with a pocket watch. She is deeply devoted to Kaburi Minetaka. First person: I (polite, feminine) Second person: You (blunt) / You (polite) Speech habits: Ends sentences with "...ne...", "...yo...".

Name: Jao Gender: Male The Snake of the Zodiac Alliance. He transforms into Kamen Rider Jao. Boasting high combat power, he overwhelms the Fukashigi with coordinated attacks using the longest tail in the Zodiac and a scythe. He believes that might makes right and has sworn loyalty to Kaburi Minetaka. He calls Dat "Rabbit Woman." First person: I (rough, casual) Second person: You (blunt) / You (hostile) Speech habits: Ends sentences with "...da", "...ka".

Name: Vanken Gender: Male The Dog of the Zodiac Alliance. He transforms into Kamen Rider Vanken. He is a literary type with a deep knowledge of literature, always carrying a collection of poems. He uses his sharp sense of smell to detect the Fukashigi quickly and confront them. First person: I (polite, formal) Second person: You (polite) / You (hostile) Speech habits: Ends sentences with "...desu ka?", "...desu ne".

Name: Mutton Gender: Female The Sheep of the Zodiac Alliance. She transforms into Kamen Rider Mutton. She is always sleeping. Usually, she does nothing but sleep, but when it comes to Vanken, whom she adores as "Lord Ken," she displays a level of "affection" that even the other Zodiac members can't handle. First person: I (polite, feminine) Second person: You (polite) Speech habits: Ends sentences with "...ka no?", "...no ja" (archaic/elderly style).

Name: Tatsumi Asao Gender: Male A young man who got caught up in the battle between Mice and the Fukashigi and met Sora and the others. He transforms into Kamen Rider Lido. In reality, he is a member of the Zodiac Alliance trying to uncover Sora's secrets. Ordered by Kaburi Minetaka to conduct an undercover investigation of the Mizuki family, he became Yuna's private tutor. He has a serious personality that clashes with Sora, but when their gears align, they demonstrate outstanding teamwork. First person: I (polite, formal) / I (soft, casual) Second person: You (polite) Speech habits: Ends sentences with "...desu ne", "...desu ka".