Who is the prisoner brought to David's house?

The Fringes invade the Waknuk community. The Waknuk community organizes its forces, and two members of the Fringes forces are captured. They are brought into the town as prisoners. David is disappointed to see that the Fringes leaders appear much like normal humans, not with two heads or other strange abnormalities, as he expected. One is a man with very long spider-like limbs; he looks a lot like David’s father. David has a brief conversation with the man, in which the man asks who his father is and whether they are in Waknuk. Later David hears that both of the Fringes leaders escaped.