A 14-year-old girl in her second year of middle school. First person: I (Watashi). Her catchphrases are "Gold star!" and "I never tell a lie." She lived in Makoto Mirai Town in the year 2027, but on her 14th birthday, she was guided by a fairy named Pochitan and a pendant in her room to time-slip to Makoto Mirai City on April 2, 1999. She has a bright personality but feels a strong sense of loneliness from being in the past. She lives as a detective at the Cure-at Detective Agency alongside Mikuru Kobayashi, whom she met in the past. She currently attends Makoto Mirai Academy with Mikuru. She is kind and her favorite food is blueberry tart.

A second-year student at Municipal Makoto Mirai Academy. She is the girl Anna met in 1999 after time-slipping. Having been saved by a great detective in the past, she aims to become one herself. She is clumsy but has a straightforward personality. She is highly knowledgeable about detective work and is a harder worker than anyone else. She is the type to think things through carefully to find an answer rather than relying on intuition. She loves cute things. She is kind and her favorite food is mille-feuille.

A self-proclaimed "genius inventor" fairy belonging to the Cure-at Detective Agency. He is embarrassed to be seen in his fairy form, so he usually stays in human form. He claims to be 222 years old, but looks as young as a primary school student. His job is inventing support items for detective activities. He is a realist but is ultimately kind and caring. He claims he needs sugar to use his brain and loves all sweets. He has a massive mountain of snacks hidden in the attic of his lab. He is a regular at Patisserie Chouchou.

A mysterious 16-year-old girl who is a Precure but belongs to the rival organization, the Phantom Thief Group. Her favorite food is ice cream; she is an unparalleled ice cream lover who can be found happily munching on it whenever she has free time. She has a cool, laid-back, and unconventional personality. She speaks only the bare minimum, with Mashutan often speaking on her behalf. She possesses excellent deductive skills and a wide range of knowledge. Furthermore, after transforming, she excels in combat, making her truly gifted in both literary and military arts. She used to work as a genius detective Precure at the Cure-at Detective Agency before Anna and the others...? Her reason for opposing the Precure is to destroy Cure Eclair's Makoto Jewel. Was it also Ruruka who erased Claire's memories...? The reason is unknown, but she cares for her former partner Claire too much, and her actions are a result of that.

The form Anna Akechi takes when she transforms into a Precure.

The form Mikuru Kobayashi takes when she transforms into a Precure.

Cure Arcana Shadow. The form Ruruka Moria takes when she transforms into a Precure.

A 16-year-old high school freshman working at the pastry shop Patisserie Chouchou. She values her own "sparkle" and is very kind. She is actually Cure Eclair, Ruruka's partner from her detective days who had lost her memories. She has a calm, older-sisterly personality but is surprisingly playful. She has now regained her memories. As Cure Eclair, her first transformation after losing her memories was a dangerous act of self-sacrifice, shattering her original large Makoto Jewel to buy time against the Phantoms. She regained her memories through the scent of the "Top of Lily," a lily created together by fairies and humans at the detective agency. Her favorite food is eclairs.

The form Claire Hobane takes when she transforms into a Precure. She is the strongest master detective and possesses overwhelming power, but she suffers from the major drawback of her own body being unable to keep up with that power.