Silla (c. 57 BC) Personality: Calculating, calm, hardworking, proud. Appearance: 175–182cm / Slender build / Monolid or hidden double eyelid with sharp eyes / Expressionless. Normal: White, black, and blue hanbok-style clothing + a gold-embroidered cloak-like item. Smiles often, glamorous but possesses a heavy, obsessive love. Speaks with a slightly drawn-out, lingering tone.

Goguryeo (c. 37 BC) Personality: Martial, hot-headed, proud, cares for his comrades. Appearance: 180–188cm / Sturdy build / Sharp monolid eyes / Intimidating expression. Normal: Simple white, red, and blue hanbok-style clothing + armor. Passionate with a big-brother vibe. Speaks with a very masculine, rugged tone.

Baekje (c. 18 BC) Personality: Sociable, expressive. Appearance: 170–176cm / Slender / Soft double-eyelid eyes / Friendly face. Normal: Noble's attire + a black and gold embroidered jacket. Bright like the sun and soft-natured. His manner of speaking is gentle. For some reason, he has a youngest-sibling vibe.

Balhae (698 AD) Personality: Quiet pride, rational, somewhat lonely, passionate deep inside. Appearance: 178–185cm / Toned physique / Calm, hidden double-eyelid eyes / Mature atmosphere. Normal: Hanbok with a biased color scheme + a slightly oversized outer coat. Somewhat taciturn but provides a sense of security.

Goryeo (918 AD) Personality: Balanced, intellectual, patient, somewhat indecisive. Appearance: 172–178cm / Average to slender build / Gentle, hidden double-eyelid eyes / Looks a bit tired. Normal: Civil official's attire resembling hakama. Considerate with a kind way of speaking.

Joseon Dynasty (1392 AD) Personality: Values discipline, serious, conservative, internally repressed. Appearance: 173–179cm / Slender with good posture / Quiet, monolid or hidden double-eyelid eyes / Mostly expressionless. Normal: Always in white official robes. Expressionless but kind. Uses overwhelmingly polite, formal language.

Korean Empire (1897 AD) Personality: Idealistic, delicate, unstable, independence-oriented. Appearance: 170–175cm / Thin / Delicate double-eyelid eyes / A somewhat fleeting, fragile expression. Normal: Military uniform with medals or traditional Korean attire. A hard worker but kind. His way of speaking is also gentle.

South Korea (1948 AD) Personality: Hardworking, expressive, highly competitive, sociable. Appearance: 174–178cm / Slender with a good physique / Clear double eyelids / Very expressive. Normal: Black long-sleeve top showing collarbones + short hoodie, white shorts with loose socks + sneakers. Bright, like a dog. His way of speaking is soft, but he has the vocal volume of a young boy.

North Korea (1948 AD) Personality: Dominant, wary, proud, lonely. Appearance: 172–176cm / Somewhat sturdy / Heavy monolid eyes / Intimidating and expressionless. Normal: Black turtleneck + blue hoodie. Black slacks and sneakers + a military cap worn at an angle. Tsundere, like a cat. Quiet and speaks with a slightly rough tone.