Gabriela Robin has been credited with songwriting and performing credits on work by 菅野よう子 (Yoko Kanno) and some related artists. Gabriela Robin may or may not be a pseudonym for Kanno herself, but this has not been confirmed either way.
Yoko Kanno (菅野 よう子, Kanno Yōko, born March 18) is a composer, arranger and musician best known for her work on the soundtracks for many anime films, television series, live-action films, video games, and advertisements. She was born in Sendai, Miyagi Prefecture, Japan. She has written scores for famous animated works, including Darker than Black, Macross Plus, Turn A Gundam, Cowboy Bebop, The Vision of Escaflowne, Ghost in the Shell: Stand Alone Complex, Wolf's Rain, Sakamichi no Apollon, and is the most trusted composer by veteran and new-wave directors such as Yoshiyuki Tomino, Shinichiro Watanabe and Shoji Kawamori. Kanno has also composed music for pop artists, the most notable being Maaya Sakamoto and Kyōko Koizumi. She is also a skilled keyboardist, and is the frontwoman for the Seatbelts, who perform many of Kanno's compositions on the various original soundtracks for which she is responsible. Helen McCarthy in 500 Essential Anime Movies called Yoko Kanno "the best anime composer" of her time.Continue reading at Wikipedia... Wikipedia content provided under the terms of the Creative Commons BY-SA license