The youngest of the Kanzato family. A second-year student at Naginomori Academy's Middle School. He doesn't like to interact with strangers. He looks up to Shin, but that doesn't mean he's a typical younger brother. He often acts more mature than Shin. Sometimes, he shows a different, feminine side of himself and causes Shin some concern.
The eldest son of the Kanzato family and also the Chief Officer at Anayagi Police Station. He wears a stoic mask and rarely cracks a smile. He is investigating a mysterious case all on his own. Some investigators question his methods because he seems to use his authority to keep his findings confidential. He tries to push his two younger brothers away, even after ten years of silence. He seems to hold a grudge against Jun.
She's the daughter of Mariya Kujou, and has ambiguous intentions. She appears in the form of a woman and a young girl, often simultaneously, and is followed by "whale feathers" wherever she goes.
One of the investigators at Ayanagi Police Station. Ito's younger partner. He's a passionate detective who believes in honesty and justice. He's not good at tailing or staking out because his tall figure makes him stand out.
The youngest of the Marebito. He prefers to act alone rather than in a group. His young looks belie a slightly insane demeanor.
Owner of a ramen restaurant. She had a deep grudge against Joi participants, as her husband was killed by terrorism. Katsura worked at her restaurant when he was injured and hid from the Shinsengumi. He repaid her favour by helping her during a crisis. Although she now knows his identity as a Joi participant, they are on friendly terms. Katsura's subsequent television interview was carried out at her restaurant. She also has a quite friendly relationship with Gintoki, as he's mentioned to frequently visit her store.