Sun-ja Hyung is a condo developer, responsible for the construction that originally unearthed the Astre Sucre Factory. She is described as a "very tall, pretty, Korean woman." She recognizes Bina from the cafe where Bina is a waitress.
Her office is in the construction site. Inside is a laptop and no phone. Bina thinks Mrs. Hyung is the type of person who lives out of her cell phone. She uses Windows 7 and is tech savvy enough to not use "Password" or "shyung" for her password.