(English) Yoo Semi is an expert in communication and is a leadership coach who trains corporations and organizations. She is also a YouTuber. Yoo has worked at Samsung C&T and Aekyung for 25 years. She has lectured before numerous companies, including Samsung Electronics, SK, CJ, KB, and Hyundai Motors, on topics such as business communication, leadership, and relationships in the workplace. She has appeared on TV including KBS's Morning Madang. She also hosts the 180,000-subscriber strong YouTube channel, "Yoo Semi's Workplace Class." Her published works include The Introspection of Relationships, I Thought Success Was Everything, and To Mr. Kim, Who Is On Your Way to Work. Yoo has written a column titled "Yoo Semi's Life Class" in the Seoul Shinmun for three years.

(Japanese) コミュニケーション、リーダーシップのプロフェッショナル。企業向けセミナーの講師。YouTuber。

サムスン物産とエギョンにトータル25年勤務。サムスン電子、SK、CJ、KB、ヒョンデ自動車といった韓国の名だたる企業でビジネスコミュニケーションやリーダーシップ、職場における対人関係などについて講義を行っている。KBS「朝の広場」などをはじめ、数々の番組にも出演。登録者数18万人のYouTubeチャンネル「ユ・セミの職場レッスン」を運営中。著書に『関係づくりの力（관계의 내공）』『成功がすべてだと思っていた（성공이 전부인 줄 알았다）』『今日も出勤する金さんへ（오늘도 출근하는 김대리에게）』がある。ソウル新聞に「ユ・セミの人生レッス」というタイトルのコラムを３年連載。