He is a "renowned" gym teacher working at Prufrock Preparatory School who wears a turban to cover his one eyebrow and expensive looking running shoes to cover his tattoo of an eye on his ankle.
He is reluctant to remove his turban for "religious reasons". Vice Principal Nero says he won't ask Genghis to violate his religious beliefs, thinking it's more important than proving Genghis isn't a killer. Genghis claims he doesn't want to remove his shoes because his feet smell.
As Coach Genghis, Count Olaf persuades Vice Principal Nero to let him put Violet Baudelaire and Klaus Baudelaire through his S.O.R.E. exams. When Vice Principal Nero gleefully expels the Baudelaire children for "cheating" during the S.O.R.E. exams, Sunny Baudelaire lunged towards Coach Genghis and removed his turban exposing his true identity. Count Olaf gets away where the White-Faced Women disguised as lunch ladies managed to abduct Duncan Quagmire and Isadora Quagmire.