Yui Sakakibara is a Japanese voice actress, singer, songwriter, choreographer, and dancer from Hyogo Prefecture, Japan. She is affiliated with the agency LOVE×TRAX. Born on October 13, she has built a diverse career in the entertainment industry since her debut in the mid-1990s. Sakakibara is known for her wide vocal range, allowing her to portray characters from young girls to mature women, and is one of the few voice actresses who performs under her real name in both all-ages and adult game roles.

Her career began with small roles and work as a backup dancer, including performances on the prestigious NHK Kōhaku Uta Gassen in 1999 and 2000. Early in her voice career, she used various pseudonyms such as Mayo Hinano, under which she was one of the recipients of the ENIX Anime Award in the voice actor category. Her versatility quickly led to a wide array of roles in anime, games, and original video animations.

Sakakibara has an extensive list of voice acting credits, with many of the user's specified roles confirmed across multiple sources. In the Dies irae series, she voices the character Marie, a role she originated in the 2007 game and reprised for the 2017 television anime and subsequent ONA, To the Ring Reincarnation. She plays Hisako Kajiura in the Otome wa Boku ni Koishiteru franchise, appearing in both the 2006 television anime and the Futari no Elder OVA. Her role as Umezaemon Matsukaze is in the 2010 OVA Mayo elle Otokonoko. One of her earlier OVA roles is Sister Pchela in the 2003 series Papillon Rose.

In the series H2O ~Footprints in the Sand~, she voices the character Hamaji Yakumo across the 2006 game, the 2008 television anime, and other related releases. She is also the voice of Niina Mikage in the 2007 web anime Saishū Shiken Kujira. Another significant role is Nono Nekomiya in the Yotsunoha franchise, including the 2006 game and the 2008 OVA, a character noted for her unique Kansai dialect delivery often referred to by fans as "Nono-ben". For the series Love, Election and Chocolate, she voices Mieru Ariake in the 2012 television anime. Finally, her role as Umi Hayasaka is from the 2006 game and 2008 OVA Harukoi Otome.

Beyond these specific examples, Sakakibara is known for many other prominent roles. She voiced Haruhi Kamisaka in Happiness!, Ayase Kishimoto in the Chaos;Head anime and games, Leona Garstein in the Super Robot Wars series, and Priecia in Prism Ark. In the video game world, her work spans numerous titles, including Sakuya in Stella Glow and Kylier in Yggdra Union. A notable recent contribution is providing the voice sample for the VOICEROID voice synthesis software characters Kotoha and Aoi Kotoha.

In addition to acting, Sakakibara is a highly accomplished singer and songwriter. She has performed numerous theme songs for the anime and games in which she appears, often composing and writing lyrics for her music. For example, she performed the opening theme for the Dies irae anime and the ending theme for Steins;Gate. She has released multiple albums and singles under the LOVE×TRAX label, and her energetic live performances often feature complex choreography. Her work as FES, the in-universe band for her character Ayase Kishimoto in the Science Adventure series, is another notable facet of her musical career.