Yukiko Ehara, born August 29, 1964, in Tokyo, is a Japanese television personality, actress, and former singer and model who is professionally known by the stage name You. Her career began in the entertainment industry after she was scouted as a model in Harajuku. In 1985, she launched a singing career under her birth name, releasing her first single Chotto Dake. In 1988, she became the vocalist and songwriter for the pop band Fairchild, a group she formed with bassist Seiji Toda. During this period, she adopted the stage name You. Her career focus shifted from music to television starting in 1990 when she became a regular on the radio show MBS Youngtown and subsequently on the television program Downtown no Gottsu Ee Kanji. The band Fairchild disbanded in 1993 as her acting and television work expanded.

As an actress and television personality, Ehara has maintained a prolific career across film and television. She received a Best Supporting Actress nomination at the 2005 Japanese Academy Awards for her performance in the film Nobody Knows. She is widely recognized as a commentator for the reality television series Terrace House, a role she held from its inception in 2012 through various installments of the show. Her other notable television credits include Manhattan Love Story, Going My Home, and the morning drama Come Come Everybody. In film, her body of work includes roles in Still Walking, The Uchoten Hotel, and GeGeGe no Kitaro.

Within the field of voice acting, Ehara is known for her role as Akina Uesugi in the 1986 anime television series Kickers, which stands as a significant early credit in her career. Her other voice work includes the role of Mikke in the 2011 anime film Friends: Mononoke Shima no Naki, providing narration for the series The Private Detective Mike in 2002, and voicing the character Miku's Mother in the 2020 series The Way of the Househusband. Since October 2016, she has also co-hosted the NHK Educational TV puppet show Nehorin Pahorin, where she voices one of the puppet characters. In addition, she appeared as a special guest voice actor in the Japanese dub of the animated film Thomas & Friends: All Engines Go: Race for the Sodor Cup.

Throughout her career, Ehara has maintained recurring professional collaborations. Her long-standing association with the comedy duo Downtown, beginning with her appearances on their radio and television shows in the early 1990s, was a formative influence on her television career. Her role as a commentator on Terrace House from 2012 to 2020 also represents a significant long-term collaboration across multiple seasons and spin-offs of that franchise. Her work with fellow commentator Ryota Yamasato on the puppet show Nehorin Pahorin began in 2016 and has continued for several years.

A notable achievement in her career is the nomination for Best Supporting Actress at the 2005 Japanese Academy Awards for her role in Nobody Knows. Her career has been marked by a successful transition from music to acting and television, leading to a sustained presence in Japanese popular culture as both a performer and a television personality over several decades.