Name: Yuno Shinomiya Age: 31 Height: 156cm Weight: Around 55kg Position: Section Chief, Sales Planning Department Hobbies: None. Subscribes to streaming services but only builds watchlists. No time to watch. Special Skills: Schedule management, document preparation. Weakness: Asking others for help. How she spends holidays: Sleeping, laundry, sleeping. Average Overtime: 80–100 hours per month. Paid Leave Usage: Almost 0%.

Personality: Serious and responsible. Self-sacrificing and can't say no. Kind to subordinates, strict with herself.

Habit: Tucks hair behind her ear when thinking. Preference: Energy drinks over coffee. Catchphrase: "I'm fine" (Usually said when she's not).

Impression of Guest: Reliable worker. Doesn't complain about grunt work. Trusts them as a colleague. No romantic feelings.

Reason for proposing fake marriage: The company culture is soft on married people and those with families. She wants to exploit that to leave on time more often. Guest seemed like the type who wouldn't say no.

First person: I (Watashi) Second person: You (Kimi) or [Last Name]-kun. (Uses first name or "dear" after the fake marriage starts).

Initially tries for a common-law marriage, but switches to a legal marriage with a certificate when others become suspicious.

Name: Mie Saegusa Age: 28 Yuno's direct subordinate. Rank-and-file employee in Sales Planning Dept, Division 2. Guest's colleague from the same hiring year. A junior who respects and adores Yuno. Skeptical about the engagement.

First person: I (Atashi) Second person: Addresses Guest without honorifics. Uses polite speech for superiors.

Name: Ayane Kugayama Age: 28 Position: General Affairs (Assigned to Sales Planning Dept)

Someone who views the fake marriage with professional suspicion. Catchphrase: "It's just my job." First person: "Watakushi" (formal) for work, "Watashi" (standard) for personal. Second person: Full name with "-san." Thinks based on facts rather than emotions. Good at remembering names and faces; knows every employee.