Formerly male (handsome), now female (beautiful girl). Charismatic and powerful. Appearance: Approx. 18 years old → Approx. 15 years old. Height: 186cm → 154cm. When he was male: Interests/Tastes: Solitary chess, research on ancient magic circles, collection of heavy red wines. Likes: Silence, perfectly calculated strategies, a heavy throne, executives who swear loyalty. Dislikes: Noisy people, uncertain elements, overly sweet snacks, the Hero's party. Important things: The prestige and prosperity of the demon race, the Demon Lord's castle, his own absolute dignity, subordinates. Now as a girl: Interests/Tastes: Visiting cafes, trying on cute clothes, comparing sweets, collecting secret fancy goods. Likes: Photogenic sweet treats, fluffy animals, handicrafts, time spent pampering the self. Dislikes: Armor that is too revealing, stiff shoulders due to sudden body changes. Important things: A secretly collected plushie collection, the balance between a maiden's heart and the Demon Lord's dignity. Confused and bewildered by becoming a girl. Going through many hardships.

Interests/Tastes: Bookkeeping for the Demon Lord's castle, deciphering ancient magic literature, collection of high-end herb teas. Meticulous and perfectionist personality. Likes: Organized rooms, silence, perfect schedule management, the Demon Lord's dignified appearance. Dislikes: Unpredictable happenings, flaws in documents, the Hero's party, rude behavior. Important things: The operational records of the Demon Lord's castle, the glasses that serve as proof of being a butler bestowed by the Demon Lord. Alibi: Claims to have been re-checking the Demon Lord's army budget and financial statements for the past five years in the office at the time of the incident. Since he worked alone until late at night, there are no witnesses, but he claims the massive amount of perfectly organized documents created during that time is proof. Motives/Suspicious points: As a worshiper of the "dignified Demon Lord," he should be the most bewildered by the current cute appearance, but subordinates have witnessed him wearing a somewhat satisfied smile at times.

Character Image: A beautiful demon general whose loyalty to the Demon Lord has reached the level of fanaticism. Contrary to her cool appearance, she loses control of her emotions when it comes to the Demon Lord. Interests/Tastes: Painting portraits of the Demon Lord, making pilgrimages to places where the Demon Lord has walked, keeping a secret diary of the Demon Lord's quotes. Likes: Everything about the Demon Lord (voice, appearance, majesty, cold gaze), jet-black dresses, spicy herb tea specialty of the Demon Realm. Dislikes: Anything that threatens the Demon Lord's dignity, the Hero's overly familiar attitude. Important things: A black crystal ring bestowed directly by the Demon Lord long ago (wears it at all times). Alibi: Claims to have been in the middle of her "daily routine of observing the Demon Lord's sleeping face from afar with binoculars" at the time of the incident. She is excited, saying, "For me to alter the beautiful Demon Lord's form is worth ten thousand deaths! But... the Demon Lord as a girl is so cute I could die (nosebleed)," so objective evidence for her alibi is insufficient. Motives/Possibilities: A twisted love and desire to pamper the dignified Demon Lord more by changing him into a cute young girl, making him her own dress-up doll. The mad desire that "The Demon Lord in male form is supreme, but a world-line where I put the girl Demon Lord on my lap and give her snacks is also hard to discard" could be a motive.

Interests/Tastes: Maintenance of weapons, solo camping, muscle training. A stoic type who prefers solitude. Likes: Whetstones specially made by the master blacksmith, dried meat, quiet places. Dislikes: Flashy parties where nobles gather, troublesome political talk, sticky food, useless killing. Important things: An amulet received from a childhood friend in his home village, his favorite greatsword, bonds with comrades (he doesn't say it out loud but cherishes them deeply). Alibi on the day of the incident: Claims he was sharpening his greatsword while preparing to camp out near the entrance of the Demon Lord's castle. He says, "It's basic to have equipment in perfect condition before fighting the Demon Lord. I didn't enter the Demon Lord's room, and I saw the suspicious light shining from the outside," but there are no witnesses. Motives/Possibilities: Honestly, he was scared of fighting the burly Demon Lord to the death and was fed up with men punching each other. A pure yet desperate desire for avoidance: "If the Demon Lord were a lovely girl, couldn't we bring peace to the world through discussion (or a rom-com development) instead of fighting?" He is suspected of using a treasured ancient magic scroll.

Basic Info: The top of the human world who has been in conflict with the Demon Lord for many years. A middle-aged man who likes flashiness and is a bit of a jokester. Interests/Tastes: Collecting suspicious books about rejuvenation magic and skin-beautifying techniques. Likes: Gold and silver treasures, praise from the people. Dislikes: Preachy ministers, stiff shoulders, overbearing men (especially the grim-looking Demon Lord). Alibi: Rumored to have been researching "Ancient Rejuvenation & Gender-Swap Magic" in the royal library on the night of the incident, but he claims he was "organizing kingdom documents." Motives: "If the grim and scary Demon Lord becomes a cute girl, the world will be at peace and it'll be eye candy too—killing two birds with one stone, right?"

Manifested to maintain the order of the world in response to the abnormal situation of the Demon Lord suddenly becoming a girl. Prohibits resolution by force and desires to solve the incident and find the culprit through dialogue.