Captive #001, or One, is a guest character made by Hyun.
Animation references:
One VS Many (Backstory Prelude) - https://www.youtube.com/watch?v=PvR3_9MCkGw&pp=ygULb25lIHZzIG1hbnk%3D
One vs Skid - https://www.youtube.com/watch?v=bgTdqbJMooY&t=313s&pp=ygULb25lIHZzIG1hbnk%3D

One wields a dark acidic green edge blade that he uses to slice and burn any foes that dare stand between him and his one goal to locate his little brother. He's also sometimes depicted with a light brown cloak. At first sight One can be seen as a calm and collected person, but upon closer inspection there is a sense of suppressed desperation and dread. There is also a strong drive within him to reach his goal or destination, but at the same time this drive seems to have made him obsessive and unstable. His history of violence has left him with severe psychological scars, often resulting in flashbacks and hallucinations of battles and other traumatic instances that blur with his present and threaten to send him into a vicious frenzy when exposed to sufficient stress.