SHE’S PROFESSOR, ENTREPRENEUR By Day, She Toils At SUNY; By Night, She’s Ice Royalty By day, Bethany Marx teaches costume design at SUNY Oneonta’s Theater Department. But with a sprinkle of fairy dust – and a lot of glitter and sequins – she becomes the Hill City Ice Queen, Otsego County’s very own princess. “When I moved here in August 2015, someone put me in touch with Carol Mandigo, and I wore my Elsa costume to Balloon Fest,” she said.…