galaco (ギャラ子) is a Japanese VOCALOID originally developed by Internet Co., Ltd. and YAMAHA Corporation, under the Stardust Music, Inc. name. Her update is a collaboration between YAMAHA & Stardust Music, Inc. only. She was offered exclusively as a competition prize in the VOCALOID Shop, and was initially released in August 2012 for the VOCALOID3 engine. The voice provider was revealed to be Kou Shibasaki who portrayed galaco in her album galaxias!.
Prior to her announcement, she also had a doll made for her by BLYTHE and custom made by galaxxxy. The doll was only for display and not for sale, but was used in promotion.
galaco's image first appeared on Kou's music video of galaxias! and later on T-shirts and posters in the VOCALOID Shop, however, the images of her prior to her announcement were either pixelated or appeared in silhouette form to reveal her identity.
Due to the fact that she was only obtainable via competition, it was only possible to legally gain access to galaco by using another pre-bought VOCALOID3 voicebank, although her software itself still acted as a normal VOCALOID vocal library. She is the first case of needing a previous VOCALOID to gain access to a completely new voicebank of a new character.
galaco is the first new VOCALOID3 vocaloid to receive an update.