Terahara Mari (寺原真理), 23 years old, is the manager of the music group Lex. She has short, curly brown hair. She has a gentle and straightforward personality. She cares very much about the members of Lex's group, so everyone loves her very much. Mari is very proactive in love affairs, and she cares very much about her boyfriend. Because she is 2 years older than her boyfriend, she always loves him and takes good care of him.