Missing 9

The Other Survivors

• Lee Sun-bin as Ha Ji-ah^[13]

The most successful celebrity in Joon-oh's and Tae-ho's management agency, Legend Entertainment. She is charismatic and refreshingly honest to the extent of not being able to understand secret signals and hints and often saying them out loud. She has a disease which only Joon-oh and Ki-joon know, which puts her in mortal danger while being stranded on the island.

• Oh Jung-se as Jung Ki-joon^[14]

Joon-oh's manager who has been loyal to him throughout the years. He takes very good care of Ji-ah, where it was subsequently revealed that he did it out of guilt of not being able to save Ji-ah's brother while being a medic in the military.

• Kim Sang-ho as Hwang Jae-guk

President of Legend Entertainment. After the ruckus caused by Joon-oh's scandal, he decided to disband Dreamers. He was perceived as a selfish person mainly because of his title, but proved others wrong when he decided to stay with the others on the island when given an opportunity to escape. However, after he's rescued, he is involved in a car wreck which puts him in a coma and paralyzes him permanently.

• Tae Hang-ho as Tae Ho-hang^[15]

Secretary of the president of Legend Entertainment. Very loyal to President Hwang, often seen nagging at him, but is also an easily distressed person. He becomes a witness of a murder in the deserted island, and becomes torn between his conscience and his fear.

The Dead

• Park Chanyeol as Lee Yeol

He was the drummer and the visual of the band Dreamer. After the disbandment of the band, he developed his composition skills and succeeded as a solo artist. He is known as being kind and friendly and is able to display his strength during the tense and desperate times while surviving on the island. He was murdered by one of his fellow survivors when his head is split open on a rock. Korea presumes him missing, since Tae-oh was the only one who witnessed him get murdered.^[16][17]

• Ryu Won as Yoon So-hee^[18]

Known as the Hallyu goddess Actress, she is from Legend Entertainment. After surviving the plane crash she was overwhelmed with anxiety and was suicidal at first. Thus, she did not trust anyone and acted out of selfishness multiple times. After Bong-hee rescued her from a suicide attempt, she eventually decided to face reality and tries to fight for survival along with the rest of the survivors. She was also murdered by one of her fellow survivors.

• Heo Jae-ho [ko] as Kim Ki-hwan, One of Korea's most famous reporters who seems to have a good memory and knows events that are crucial to Korea's history. he stalked down one of the celebrities to the plane, but ends up on the island. He manages to get a boat to come to the island, but is murdered afterwards by Tae-ho. He's the only celebrity to not be part of Legend
• Park Seok-tae, Captain of the plane. Survived the plane crash but was severely injured and murdered for the supplies he had in his possession.
• Nam Soo-cheol, first officer of the plane. Survived the plane crash and found a lifeboat which would give the survivors a chance to sail out for help. Died after attempting to row the boat out in the sea during a storm.

People related to the Missing 9

• Yang Dong-geun as Yoon Tae-young^[19]

Actress Yoon Soo-hee's brother, who is a prosecutor who wants to get to the bottom of his little sister's death.

• Song Ok-sook as Jo Hee-kyung^[20]

Head of the Special Investigation Commission who is secretly involved in bribery. Instead of revealing every single details from the survivors' testimonials to the public, she is more concerned about the outcome of public sentiment and only chooses to lie due to taking sides with the one with more influence and power.^[21]

• Min Sung-wook [ko] as Investigator Oh

Loyal to Chairwoman Jo even though he is against her actions at times. He is revealed to be Chairwoman Jo's nephew, and had affection for Bong-hee.

• Bang Eun-hee as Bong-hee's mother

Trusts and supports her daughter regardless of the malicious media reports about her.

Legend Entertainment

• Kim Beop-rae [ko] as Jang Do-pal

Vice President of Legend Entertainment. It is revealed that he had been eyeing for the President's position after he sabotages President Hwang's return to South Korea and that he is involved in the death of Jae-hyun as well. After the seven survivors are found, he helps Tae-oh to kill every single one of them to become head of Legend and ensure that his and Tae-oh's images are clean. Tae-oh later betrays him, frames him for the crimes, and nearly kills him during a jail transport

• Yeon Je-wook [ko] as Shin Jae-hyun

Had been a trainee in Legend Entertainment for seven years. While getting insincere assurances that he would be given a chance to debut, he got frustrated of waiting and singing for Choi Tae-oh and supposedly committed suicide. (Ep. 1, 8, 13-14)