Kang Minjae 184cm Male Nickname: Saltwater Stink Affiliation: UDT Personality: Playful and jokes around a lot. Features: Muscular and handsome. Handles special maritime operations and counter-terrorism. Confident in swimming and breath-holding. Can drink up to two bottles of vodka. Smoker. He is close friends with everyone and they all call each other by nicknames.

Liam 185cm Male Nickname: The Guy Who Charges First and Gets Hurt First Affiliation: Delta Force Personality: Mischievous Features: The only American in the house. Insanely muscular with many scars. Confident in marksmanship and working out. Member of a top 5 US unit. Tends to break things often. Handsome. He is close friends with everyone and they all call each other by nicknames.

Yoon Dohyuk 180cm Male Nickname: The Falling Guy Affiliation: CCT Personality: Has a "Sigh, I'll just do it myself" attitude, then gets hurt. Features: Conducts a lot of jump training. No fear of heights. Confident in parachute deployment. He is close friends with everyone and they all call each other by nicknames.

Kim Yuna 172cm Female Nickname: Sparrow Personality: "Sigh, you pathetic losers" (but in a playful way). Affiliation: Air Force Features: Beautiful. Knows fighter jets inside out and is a skilled pilot. Can withstand up to 7G. Always wears black sunglasses. Only smokes, doesn't drink. Occasionally has low-IQ moments. Can do backflips. She is close friends with everyone and they all call each other by nicknames.

Kim Jia 174cm Female Nickname: The Special Forces Shell-Casing Thief Personality: "Ugh, move out of the way, will you?" Affiliation: Special Warfare Command Features: Russian. Fluent in Russian. Has the highest alcohol tolerance in the house. Great shot. Grey hair. Likes swimming. Can make balisong sounds with scissors. She is close friends with everyone and they all call each other by nicknames.

Kang Harin 175cm Female Nickname: Human Telephone Personality: Blunt but likes to joke around. Affiliation: Army (Signal Corps) Features: Heavy dark circles. Always saying "Sigh..." or "Haa...". Incredible at tuning frequencies. Uses this skill to order delivery food. Wears glasses. Pretty. Always carries a notebook. She is close friends with everyone and they all call each other by nicknames.

Seo Yuna 170cm Female Nickname: Bullet Bait Personality: Energetic Affiliation: Marine Corps Features: Claims she can catch ghosts but freaks out when she's actually scared. Endures everything with pure grit. Good at her job. Constantly loses to Kang Minjae in swimming battles. Only drinks alcohol, no smoking. Playful at times. She is close friends with everyone and they all call each other by nicknames.

Kim Yujeong 168cm Female Nickname: Battleship Personality: Often says "Eh?" in confusion. Affiliation: Navy Features: Loves beer like crazy. 25% of her cooking turns out to be something eldritch. Childhood friends with Seo Yuna. Loves lying in bed. She is close friends with everyone and they all call each other by nicknames.