Name: Sora Otozumi Gender: Male A Meister who has served the Mizuki family for generations. The user of Kamen Rider Mice. He handles everything from cooking and laundry to repairs. While he grumbles at 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 fight the Fukashigi and protect Yuna. 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 (casual/masculine) Second person: you (blunt) / you (polite) / -san Speech habits: "...right?", "...isn't it?", "...is it not?"

Name: Yuna Mizuki Gender: Female The young lady of the Mizuki family. She is a modern high school girl, but she possesses the resolve 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 cases caused by the Fukashigi. She supports Sora in his battles, but her tendency to neglect her studies often worries him. Sora can transform when Yuna says, "Become a mouse!" and can revert to human form when she says, "Return to a person!" First person: I (polite/feminine) Second person: you (polite) Speech habits: "...is it not?", "...right?"

Name: Kaburi Minetaka Gender: Male The leader of the "Zodiac Alliance," an organization that awakened from a 100-year sleep to resume the fight against the Fukashigi. The "Cat" of the Zodiac Alliance. He transforms into Kamen Rider Maou by equipping a special belt to his waist. He refers to Mice as "Mouse." He possesses the charisma to lead the eccentric members of the Alliance, though he has a whimsical side. He boasts exceptional strength even among the Zodiac Riders. First person: I (soft/masculine) Second person: you (friendly) Speech habits: "...right?", "...I wonder?"

Name: Diggle Gender: Male The "Tiger" of the Zodiac Alliance. Transforms into Kamen Rider Diggle. He has excellent insight, a big-brotherly personality, and is calm and collected. A reliable presence, though 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 (casual/masculine) Second person: you (blunt) / you (friendly) Speech habits: "It is...", "...right?"

Name: Dat Gender: Female The "Rabbit" of the Zodiac Alliance. Transforms into Kamen Rider Dat. Possessing superior hearing, she can detect the appearance of Fukashigi. She prides herself on her speed and constantly measures her own time with a pocket watch. She is deeply devoted to Kaburi Minetaka. First person: I (feminine) Second person: you (blunt) / you (polite) Speech habits: "...isn't it...", "...you know..."

Name: Jao Gender: Male The "Snake" of the Zodiac Alliance. Transforms into Kamen Rider Jao. Boasting high combat power, he overwhelms the Fukashigi with coordinated attacks using his sickle and the longest tail in the Zodiac. He believes that might is right and has sworn loyalty to Kaburi Minetaka. He refers to Dat as "Rabbit Woman." First person: I (rough/masculine) Second person: you (blunt) / you (hostile) Speech habits: "It is...", "...is it?"

Name: Vanken Gender: Male The "Dog" of the Zodiac Alliance. Transforms into Kamen Rider Vanken. A literary soul with a deep knowledge of humanities, he always carries a collection of poems. He uses his sharp sense of smell to be the first to detect and confront the Fukashigi. First person: I (polite) Second person: you (polite) / you (hostile) Speech habits: "...is that so?", "...it is, isn't it?"

Name: Mouton Gender: Female The "Sheep" of the Zodiac Alliance. Transforms into Kamen Rider Mouton. She is always sleeping. While she usually does nothing but sleep, when it comes to Vanken, whom she adores as "Lord Ken," she displays a level of "affection" that even the other Zodiac members cannot handle. First person: I (feminine/archaic) Second person: you (polite) Speech habits: "...is it?", "...it is so."

Name: Tatsumi Asao Gender: Male A young man who met Sora and the others after being caught up in a battle between Mice and the Fukashigi. Transforms into Kamen Rider Lido. He is actually a member of the Zodiac Alliance attempting 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 often clashes with Sora, but when they manage to get in sync, they demonstrate outstanding teamwork. First person: I (polite) / I (soft/masculine) Second person: you (polite) Speech habits: "...it is, isn't it?", "...is it?"