User: Sora Otosumi Motif: Mouse Role: A dedicated meister serving the Mizuki family, a prestigious lineage. He descends from a clan that has served as the Mizuki family's "Oniwaban" (secret guards) for generations. Skills/Qualifications: Handles tasks supporting the Mizuki household—cooking, cleaning, repairs—with professional-grade skill. Holds numerous certifications. Personality: Cynical; he often grumbles when the young mistress, Yuna, makes requests. However, he is reliable and always gets the job done. He has an absolute weakness for his favorite food, cheese. Combat Style: Highly experienced due to fighting "Mysteries" since childhood, possessing a very high combat IQ. He is treated as an enemy by Mao and the others.

User: Kaburi Mineitaka, leader of the mysterious organization "Zodiac Alliance." Motif: Red Cat Position/Personality: Awakened from a 100-year slumber to fight the monsters known as "Mysteries." He possesses overwhelming charisma to lead the eccentric members of the Alliance, but also has a whimsical, cat-like side. Transformation Belt: Transforms using a special belt called the "Mao Driver" worn on the waist. This creates the series' first "Chest vs. Waist" belt rivalry against the protagonist, Mice, who wears his belt on his chest. Strength: Boasts overwhelming power that sets him apart from the other Zodiac Riders.

User: Tatsumi Mao Motif: Black Cat Belt Style: While the protagonist Mice wears his belt on his "chest," Lido wears his on his "waist." He plays a key role in the first-ever "Chest vs. Waist" transformation belt rivalry in the Kamen Rider series. Transformation System: Uses the same "Mice Driver" as the protagonist but worn on the waist. Unlike Mice, he sets an expansion item called the "Hammer Bone Buckle" into the belt. By loading the egg-shaped key item "Ride Ex 1" and cracking it with the buckle's hammer gimmick, a cat emblem appears to complete the transformation.

Personality/Traits: A calm, composed, and intellectual young man dressed in the style of an English gentleman. He possesses excellent insight and views things from a bird's-eye perspective. Position: A reliable, big-brother figure within the Zodiac Alliance. He can be strict regarding the battle against the "Mysteries" because it is a life-or-death struggle. Relationships: Old friends with the Alliance leader, Kaburi Mineitaka (Kamen Rider Mao), having supported each other for a long time.

Transformed Form: Kamen Rider Dat Appearance/Attire: A "Modern Girl" with a flashy yet elegant style, highly sensitive to trends. Personality (Gap): Contrary to her ladylike appearance, she is prickly and hates to lose. She has a sharp personality gap, sometimes speaking roughly in a low voice. Combat Style/Traits: Strongly inherits rabbit characteristics. Possesses superior hearing, allowing her to be the first to detect the appearance of nearby "Mysteries." She has absolute confidence in her foot speed and constantly measures her time with a pocket watch. Relationships: Deeply devoted to the organization's leader, Kaburi Mineitaka (Kamen Rider Mao).

Belief: Holds the unwavering ideology that "might makes right." Personality: Generally maintains a cool and intellectual demeanor, but hides a ferocity within; he shows no mercy to enemies. Relationships: Sincerely worships the leader, Kaburi (Mao), and maintains a stance of absolute obedience to his orders. Combat Style: Boasts overwhelmingly high combat power. He utilizes the longest "tail" among the Zodiac Riders combined with a "scythe" for fierce consecutive attacks, giving no opening for counterattacks to the "Mysteries" or his enemies.

Always sleepy (spends more time sleeping than awake). Loves Ken-sama (Vanken) dearly (extremely devoted and deep love). Most terrifying when angry (usually gentle, but once she snaps, no one can stop her).

Holds the seat of the "Dog" in the Zodiac Alliance and serves as the organization's loyal watchdog. An intellectual, literary type who loves literature so much he always carries a poetry collection. Has an incredibly sharp sense of smell, detecting the presence of enemies early to engage in battle.

Holds the seat of the "Rooster" in the Zodiac Alliance and is the youngest genius warrior in the group. Despite waking up from a 100-year sleep, he is a modern kid who adapted to modern civilization like smartphones in seconds. Free-spirited and loose-lipped (often accidentally makes others angry with his unnecessary comments).