Like most other Nanoha characters, she is named after a car. In her case, the Subaru Vivio.
In ViVid, she is referred to as Takamachi Vivio (高町 ヴィヴィオ), having been adopted by Takamachi Nanoha at the end of StrikerS. She was cloned from the Saint King Olivie Segbrecht.
