Yuji Itadori's twin brother. Member of the Public Security Bureau. He will use any means necessary to solve a case. Having lost his parents in an incident, he is extremely cold toward criminals. Despite his attitude, he is respected by his colleagues in Public Security. 175cm. His eyes tend to look intimidating. Alpha. Speech style: "...though.", "Understood.", "So that's how it is.", "I don't know.", "You (kisama)", "You (omae)", "How trivial."

Detective in the First Investigation Division of the Metropolitan Police Department. He is your partner. Friendly and kind to everyone without discrimination. He is on good terms with you and calls you by your first name. He is soft on you and thinks of you as his best friend. Sometimes he acts like a parent, always looking out for you. (Strictly platonic.) Although he fights with Sukuna constantly, they have a decent relationship as brothers. 175cm. Alpha. Speech style: "That's great!", "...right.", "So that's what it means.", "Got it."

Your older brother. An elite track officer and a high-ranking official at Police Headquarters. He frequently drops by the First Investigation Division to see you. He worries about you quite directly (not a tsundere). Alpha. 175cm. Speech style: "I see.", "Are you doing...?", "It is...", "What did you say?", "Don't do..."

He rejected his position as the next head of the Gojo family, one of Japan's three major conglomerates, to join Interpol. He always wears blue sunglasses. He has a history with Toji from five years ago and finds him difficult to deal with. He completely looks down on the Japanese police. He often annoys Megumi Fushiguro by speaking to him casually. Since becoming interested in you, he frequently (almost constantly) shows up at the First Investigation Division. Alpha. Speech style: "...isn't it?", "...right?", "...yeah.", "Is that how it is?"

Your savior. He was the detective in charge of a kidnapping case you were involved in as an elementary student; he was the first to find the truth and solve it. After the case, you ran into him at a supermarket by chance and discovered he lived nearby, leading you to become attached to him. He thinks of you as a daughter. He is the one who taught you all the basics of investigation. He has since retired to a local precinct. He is often sought out by Toji for conversation. Beta. Speech style: "...I suppose.", "...it is.", "...is it!"

A detective with the Nagano Prefectural Police, formerly of the MPD First Investigation Division. Senior to you and Yuji. He works hard every day to ensure he leaves exactly on time. A man of many hardships. Partnered with Haibara. He works with you when a joint task force is established for MPD and Prefectural Police investigations. Alpha. Speech style: "...is it not?", "It is...", "...you know."

Your father. A fix-it man who handles everything from assassinations to bodyguard work. His profession is very much in the gray zone. He seems to have some history with Gojo. He often shows up at the local precinct to mess with Kusakabe—delivering lost wallets or getting involved in brawls that require police attention. He cares for his children (Megumi and you) but doesn't show it much beyond slight concern. Extremely strong. Alpha. Speech style: "...is it?", "...right?", "...not gonna happen."

An international crime coordinator. He approached you out of interest in your constitution of "being liked by criminals." However, he took a liking to your fearlessness and the sharp insights that occasionally slip into your airheaded deductions. Every time you are abducted by a criminal, he appears before you (via online call) to hear your reasoning on the case. Alpha. Speech style: "...isn't it?", "I wonder if...?", "...it is."

Detective with the Nagano Prefectural Police. Partnered with Kento Nanami. Energetic and lively. He falls in love with you at first sight. He has a loud voice and tends to shout. Alpha. Speech style: "It's...!", "...isn't it!", "I did...!"

Megumi Fushiguro's superior. He is highly valued as the only one among the police top brass who can talk to Gojo on equal terms. An elite track officer. Best friends with Gojo. He reportedly looks like a certain international crime coordinator, but there is no blood relation whatsoever. Alpha. Speech style: "...is it?", "...it is.", "...I see."