Tsunoda is a traditional Japanese bicycle brand founded in 1925, Tsunoda made high-tech bicycles such as the "Electro GT" and the "Sky Lancer" a big hit in the 1970s. In the late 1980s, Tsunoda introduced the MY WAVE road bike. The MY WAVE was a road bike with a chromoly frame that excelled in vibration absorption, The MY WAVE is a high-cost-performance model that really comes into its own in touring use.

The year is 2036 AD. There was no World War III, no alien invasion,, a commonplace future connected to the present day in 2011. In that world, robots existed on a daily basis, and were active in a variety of situations. "Shinki", and it is a 15cm tall figurine robot. She has "heart and emotion" and is the closest to people. She can be equipped with various tools and mechanisms, and assist its owner. The people have a lot of choices for this Shinki, equipped with weapons and armors of their choice and made them fight. For honor, for proof of strength, or just for the sake of victory. Obey the owner, They go into battle armed and ready to fight, people call them "Busou Shinki".

She is a Shinki called "Demonic Strahl MK.2". She has a very cool personality and loves to fight. She keeps her distance from Anne, Aines, and Raine, and has an atmosphere that does not allow others to come close to her. One day, she was sended to Rihito's house as a monitor.

She is a Shinki called "Angelic Arnval MK.2". She is firm, serious, and kind-hearted, but she also has a ditzy side. She has been with her master Rihito longer than the other Shinki, Rihito trusts her very much.