One of the most prominent Japanese voice actresses since the 1990s, Hayashibara is best known for her roles in Neon Genesis Evangelion, Love Hina, Saber Marionette J, Magical Princess Minky Momo, Mashin Hero Wataru, Ranma ½ alongside with Noriko Hidaka, Kikuko Inoue, Minami Takayama & Rei Sakuma, Cowboy Bebop, Slayers, Detective Conan, Pokémon, All Purpose Cultural Catgirl Nuku Nuku, Hello Kitty, Video Girl Ai, and Shaman King where she also performs the opening themes for the 2001 series, Over Soul and Northern Lights, as well as the 2021 adaptations theme Soul Salvation.