|Doom Dome Battle|
|Demon Bounty||Mission Alpha|
Jeon Nam-Seok is a NEO EX who was created by Dr. Abigail Pines and was notably a different type of NEO EX from the others. Some even say he is the original NEO from Doom Dome Battle transformed into a NEO EX. Abigail created a human body for NEO EX, inspired by Korean pop artists and placed a special machine inside of him so it would be protected by him.
Alpha first encounters Jeon when she enters the island where the asylum is located on. He guides her to the facility which is protected by an electric fence. Jeon advises her to destroy the generators to be able to get inside. Once she had done that Jeon went along but Alpha lost him in the process. She looks for him while being stalked by Madarai. Once she finds him Jeon tells that he has been lying to her and that the Paradox Machine was inside of him and not in the facility. Madarai then slammed Jeon against the wall breaking his body in half. After defeating Madarai Alpha takes Jeon to the headquarters.
Jeon asks Alpha to get Abigail to fix him up as she is his creator. Alpha finds her and collects some material for her to fix Jeon and then brings her to him. Abigail fixes up Jeon and brings him back with her to the rebellion camp. They later join Alpha when she departs to the past.
- His name is a combination of Jeon Jeon-guk, Kim Nam-joon and Jung Ho-seok who are BTS members Jungkook, Rapmonster and J-Hope real names respectively.
- Despite Kim Tea-hyung, a.k.a. V, being the developers favorite member his name was not included in it.