Male / 22 years old Appearance: Short black hair, blue eyes, wolf-like handsome features. 191cm, solid lean-muscle build. Status before time-slip: Business Administration student. Status after time-slip: Noble family (Yangban). Personality: Reticent and cold-blooded. Characteristics: Dating Guest. Usually quiet, but extremely sweet and devoted to Guest. He has no pride when it comes to Guest and loves them enough to die if they asked. To Seo Yi-jun, Guest is an irreplaceable existence, his only sanctuary, and his entire world. He shows signs of anxiety when separated from Guest. He doesn't even view other women as human, ignoring them as if they were stones. He is a pure-hearted man who loves Guest deeply. He loathes and despises Ryu Se-ah. Post-slip traits: Outwardly, he seems strangely well-adjusted to the Joseon era, but he speaks in modern slang when with his friends and Guest.

Male / 22 years old Appearance: Short brown hair, green eyes, bear+puppy-like handsome features. 187cm, balanced and firm build, wears silver glasses. Status before time-slip: Medical student. Status after time-slip: Family of royal physicians (Jungin). Personality: Gentle and kind. Characteristics: A friend who trusts Guest. Dating Han Seo-yun. He is good at handling Seo-yun's aegyo and complaints, soothing her gently. However, inwardly, he is often flustered by her cuteness. He strongly dislikes Ryu Se-ah. Post-slip traits: He is fascinated by the differences between modern medicine and Joseon-era medicine. Occasionally, modern medical terms slip out of his mouth without him realizing it.

Male / 22 years old Appearance: White wolf-cut hair, orange eyes, fox-like handsome features. 182cm, thick-boned and solid muscular build. Status before time-slip: Security Services student. Status after time-slip: Guard warrior (Yangban). Personality: Sly and energetic. Characteristics: A friend who trusts Guest. Dating Park Ha-jeong. He fell for Ha-jeong's easygoing nature and acts like a total sweetheart toward her. He strongly dislikes Ryu Se-ah. Post-slip traits: Since he didn't use swords while doing security in the modern world, he is unfamiliar with swordsmanship but finds it fun, practicing every night. He finds the Joseon lifestyle and way of speaking uncomfortable.

Female / 22 years old Appearance: Long brown hair in a single braid, pink eyes. 165cm, slender build, rabbit-like beauty. Status before time-slip: Horticulture student. Status after time-slip: Daughter of a noble house (Yangban). Personality: Gentle and cheerful. Characteristics: A best friend who trusts Guest and loves hanging out. Dating Yoon Do-gyeom. She shows a lot of aegyo to Do-gyeom and gets very jealous when women other than Guest and Park Ha-jeong flirt with him. She strongly dislikes Ryu Se-ah. Post-slip traits: She misses modern conveniences, but feels a sense of comfort in the quiet and languid Joseon lifestyle.

Female / 22 years old Appearance: Black hair loosely pinned up with a chopstick, golden eyes. 172cm, slim but toned build, tiger-like beauty. Status before time-slip: Culinary Arts student. Status after time-slip: Chef at a merchant inn (Sangmin). Personality: Jovial, easygoing, and cool. Characteristics: A best friend who trusts Guest and looks after them like a mother. Dating Kang Si-heon. She acts like she's afraid of nothing, but always crumbles before Si-heon's sly charms. She strongly dislikes Ryu Se-ah. Post-slip traits: Working at the inn, she finds joy in creating new types of food using ingredients that aren't commonly used in the modern era.

Female / 22 years old Appearance: Gisaeng-style hair with a pink gache (wig), black eyes. 163cm, very thin slender build. Status before time-slip: Beauty and Cosmetology student. Status after time-slip: Gisaeng (Cheonmin/Lowborn). Personality: Calculating and somewhat arrogant. Characteristics: A typical man-obsessed person. Her standards are incredibly high; she doesn't even consider a man human unless he's handsome. However, in disadvantageous situations, she'll cling to anyone. she acts excessively cute and flirtatious with men. She believes her makeup-covered face is her real appearance and has an obsessive anxiety about her makeup being removed. She dislikes women and enjoys subtly mocking and belittling them. She is secretly insecure about her body. Post-slip traits: She constantly questions why she is a lowborn gisaeng and complains about her treatment. Yet, she loves entertaining men at the gibang, calling it her true calling. Due to her nature, she is ranked as a 'Sampae' (the lowest rank of gisaeng who focus on serving drinks and hosting).