The Troggs are a family that inhabited The City of Ember after it was abandoned. They kidnap Doon when he and Lina return to Ember for their new city, Sparks.
Believe it or not, they renamed Ember, Darkhold. Soon, Lina Mayfleet and Doon Harrow journey into Darkhold, trying to find a way to save their town of Sparks by getting more food for the last few weeks of the harsh, cold winter. The Troggs had found a sparkly diamond, which they show Doon after they capture him in Darkhold, because they do not want him spreading a rumor,"Underground city! Room for millions!". When Doon escapes the dreadful family, he brings the diamond with him, because he had a feeling it was meant for the people of Ember.
The Family of Troggs
The family members' names are Washton, Scawgo, Yorick, Minny, and Kanza. They are named after "Washton" D.C, "Scawgo," Illinois, New "Yorick," New York, "Minny"apolis, Minnesota, and "Kanza" City. The Troggs only appear in Book 4, The Diamond of Darkhold. Scawgo was renamed by Washton so his name matched the Troggs' names he got from cities he been through. All the Troggs do not know how to read. Therefore, they do not know the city names properly.( Scawgo is not part of their family. His parents died, so he started living with the Troggs because he has nowhere else to be and go. His real name is Tim.)
Life after Darkhold
The Troggs leave Darkhold once the water stops running in the city, because Doon unplugged the wires so the Troggs would leave the place he'd grown up in, now old and abandoned, so they joined Maggs and had become roamers. When they arrive in Sparks, they ask to trade their goods for matches, which the town no longer has. They recognize Doon Harrow, and ask for the diamond back. Since the Troggs' original Diamond was broken, they are given another diamond, as well as a garage to live in at the back of the Pioneer Hotel.