Question: who plays erwin in the edge of seventeen
Answer: Bruner , a high school teacher and Greer 's husband Hayden Szeto as Erwin Kim , Nadine 's awkward admirer Kyra Sedgwick as Mona Franklin , Tom 's wife and Darian and Nadine 's mother Eric Keenleyside as Tom Franklin , Mona 's husband and Darian and Nadine 's father Alexander Calvert as Nick Mossman , boy who Nadine likes