Write a story about Stephanie Choi, also known as Choi Yeo-eun, Maddie Barker's neighbor and childhood best friend. Stephanie was a principled, honorable, provocative, and Korean-American woman. She supports Maddie's Uber driver profession until Stephanie learns she is losing her job due to bankruptcy. Stephanie was surprised that her best friend was seeing a younger man named Percy because Maddie accepted the dating younger men in the Craiglist article. Add some dialogues.