Nid is a resident of Teras Terrace who spends most of its time sitting motionless underground. (Unlike most of the residents of the Terrace who can't be clearly classified as male or female, Nid prefers to be referred to by the pronoun "it".) Nid often turns up when someone digs in the earth of the Terrace—rather more likely than would seem to be the case by chance, leading to speculation as to whether it somehow anticipates excavations and positions itself at their sites. If asked what it was doing underground, Nid invariably answers "Thinking". Longtime residents of the Terrace know better than to follow that up asking Nid what it was thinking about, since it tends to give disquieting answers like "The pregnant void that lies beyond the self" or "The lies we become on waking."