Knot is a middle-ranking official who works in the main office of the ACCA Inspection Department. He is a father of three children, aged three, five, and seven, and his wife has left him, leaving him to raise them alone. This personal situation gives him a fatherly, homely character that is evident in his demeanor at work. He has short black hair and black eyes. His role in the story is largely as a background employee within the ACCA headquarters, handling routine office tasks; he does not drive the plot or undergo significant personal development. His motivations are primarily centered on his family responsibilities and his professional duties, though the series does not explore them in depth.