|Also Known as||MK1|
|Race & Species||Human|
|Affiliation||RE Taekwondo Force|
Choi Do-Ha appears to be in his early twenties. He has medium-length, light-brown hair. He is always shown in either a soldier's uniform or in a modified combat suit.
He was initially shown to have a shy and obedient attitude. But it was later revealed to be a ploy to confuse his enemies because as MK I he is shown to be ruthless and love to kill.
He is an expert practitioner of Renewal Taekwondo, showing great skill by defeating multiple opponents with one attack. He also has his own personal martial arts that utilizes the manipulation of wires to attack.
Superhuman Endurance: Choi Do-Ha has shown remarkable endurance and stamina.
Superhuman Agility: Due to the natural strengthening of his body from training he has supernatural Agility. He is agile enough move any any position as he sees fit. He has shown the ability to effortlessly flip and jump around a fight using most surfaces to his advantage.
Super Human Strength: Choi Do-Ha has shown strength numerous times throughout the series even managing to move a door weighing tons by 33cm.
Superhuman Speed: Choi Do-Ha has shown remarkable speed. Several times he has closed the distance from opponents and appear near them in an instant.