Mr. Trentlake was a history teacher at Perdido Beach School who was known to get excited when talking about history. He poofed when the FAYZ began, with all of his students watching. Some of Mr. Trentlake's third-period students included Sam Temple, Quinn Gaither, Mary Terrafino, Edilio Escobar, Josh, and Bette.
Like every person who poofed, it is unknown if Mr. Trentlake is alive and well outside of the FAYZ, or if the poof killed him. Mr. Trentlake is one of the first characters mentioned in the Gone series.