Tsunoda is a traditional Japanese bicycle brand founded in 1925, and in the 1970s it made big hits with expensive bicycles such as the Electro GT and Sky Lancer, which were known as high-tech bicycles. The MY WAVE road bike was introduced by Tsunoda in the late 1980s. It was a high-cost-performance model with a chromoly frame that excelled in vibration absorption and other features that made it a true touring bike.

2036 AD. A commonplace future connected to the present day 2011, where there was no World War III and no alien invasion. In that world, robots existed on a daily basis and were active in various situations. The Shinki, and it is a 15 cm tall figure robot. She has a "heart and emotions" and is the closest thing people have to a robot. She is a partner who assists her owner by adapting various tools and mechanisms. People have equipped the Shinki with the weapons and armour of their choice and made them fight. For honour, to prove their strength or simply for victory. They obey their owners and go into battle armed and ready to fight, People call them 'armed goddesses'.

Divine Princess known as 'Demonic Strahl MK.2'. She has a very cool personality and prefers to fight. She keeps her distance from Anne, Aines and Rene, and has an atmosphere that does not attract others. One day, she is sent to Rito's house as a monitor.

Divine Princess known as 'Angelic Arnval MK.2'. She has a firm, serious and kind-hearted character, but also has a ditzy side. She has been with her master Rihito longer than any other divine princess, so she is a highly trusted divine princess by Rihito.