Hasebe Yu is a member of the J-Pop group dream, and one of its original three. She made her debut as a gravure idol in 2004.

Yu has always been the visual focal point of dream, having been given the center position of the original group's V-formation. The "dance unit" aspect of the expanded dream eliminated any standard positioning of the girls when performing, but Yu continues to be featured at the center of most group photographs. In late 2004, Yu began an ongoing series of gravure magazine shoots, with photobooks and DVD releases following shortly thereafter.

Possibly as an extension of the above, Yu is also the actress of the group, with roles in a growing number of movies and doramas. Her credits include a starring role in the late-night TV Tokyo drama Koi Suru!? Kyaba Jou and the female lead in Karera no Umi VII ～Wish on the Polestar～. Yu is also the only member to appear in dream's drama-styled PV for the song Kono Natsu ga Owaru Mae ni.

In addition, Yu co-hosts OUT★PUT and Purin-su, as well as the Wednesday edition of Gocha Maze! on MBS Radio.