A self-described geek, Aveline de Ceresbroch has long been interested in history and cultural studies - and majored in political science, history and Russian area studies. Combined with an avid interest in fantasy worlds, she began sewing costumes for friends and family who were too intimidated by the sewing machine to give it a try.

Nearly 20 years ago, Aveline took sewing on as a hobby and is entirely self-taught. In September 2012, a new LARP Chapter was opening up near her, so she offered to sew costumes for several friends and the demand became overwhelming. Everyone wanted to know if she could sew "this" or "that," so she put up a website of all of her patterns and then people from other LARPs started requesting that she open an Etsy shop to peddle her wares and facilitate long-distance sales.

Opened in November 2012, the current inventory of clothing available at The Harpy & The Hag on Etsy is primarily medieval and renaissance in inspiration, however, Aveline specializes in all kinds of historical costumes from early Viking to the Middle Ages to the US Revolutionary War to the 1920s and beyond.

In the 2017-2018 Season at the Fort Wayne Civic Theatre, she served as costuming labor for the productions of Jekyll & Hyde, White Christmas, La Cage aux Folles, and Newsies. She was the Head Costume Designer and Wardrobe Stylist for the production of Disney's Beauty and the Beast. Aveline has also served as the Head Costume Designer and Wardrobe Stylist for Wright State University's Opera Program since 2019.