Ambris Hentadile, most commonly known as The Professor, was the brother of Ifflix Hentadile and the apprentice of Cassix Lodestone. He was a dour Fourthling who often wore a crushed funnel hat, which was favoured among Third-Age Scholars. He was known for gambling, but he decided to stop after thinking about what Cowlquape Pentephraxis would have thought of such behavior. He also initially distrusted Weelum, and saw him as a woodlander which had no place in Great Glade. When Ifflix was killed in the Ancient Laboratory in Sanctaphrax, Ambris decided to descend below the Edge to find out what was beneath, as his brother had once sought to do.