Lee Ye Sol (이예솔; also simply as Ye Sol) is a South Korean trainee. She is a former RBW trainee and former member of the trainee group 365 Practice. She is best known for being a contestant on the survival show MIXNINE. In October 2017, she became a contestant on the survival show MIXNINE. She was eliminated in episode 7 after ranking 82nd place. In February 2020, it was brought attention to fans that Ye Sol has seemingly left RBW and 365 Practice. She has not been featured on any of the group's social medias since January 2020 and has since opened up a personal Instagram account.