ONE is a Vocaloid character developed by 1st Place Co., Ltd. and released for the Vocaloid 4 engine. She is also part of the CeVIO Creative Studio, where she is voiced by a Japanese voice actress. ONE is known for her clear and versatile vocal capabilities, allowing her to perform a wide range of musical styles. As a virtual singer, she doesn't appear in a traditional anime series but is featured in various multimedia projects and music videos. Her character design is striking, with futuristic elements that complement her role as a digital performer.