Anna's buddy, a somewhat airheaded and innocent middle school girl! She can transform into Cure Mystic, but... due to the influence of the current enemy, she is unable to transform. The key to her transformation lies with the Enhanced Hanninder.

Mikuru's buddy, a bright and energetic middle school girl who never tells a lie! She heads to London after losing contact with Mikuru. She can transform into Cure Answer. Her catchphrase is "Hanamaru!" (A gold star!)

Claire's buddy, a mysterious and cool high school beauty who loves ice cream. She judges this case to be highly complex. She can transform into Cure Arcana.

Ruruka's buddy, a dignified high school girl who is a bit clumsy and loves eclairs. She believes the current enemy is extremely troublesome. She can transform into Cure Eclair.

A genius boy inventor over 200 years old who went to London with Mikuru. He has been captured, and his Pri-Kits are being misused.

An executive of the Phantom Thief Troupe, a gal with power on a completely different level from previous Nizies. She uses outdated slang like "Cho-berigu" (super very good) and "Cho-beriba" (super very bad). She utilizes the Enhanced Hanninder and Pri-Kits.