A prefecture located in the northern part of the Kanto region of Japan. It is a major agricultural prefecture, with strawberries and kanpyo (dried gourd) as its specialties. It is also the center of Japan's automobile industry.

Eitan is a character created by the "Ichigo-chan Berry Project Transition Committee," a coterie of Tochigi Prefecture residents, as part of their activities to create and raise a moe character that would represent Tochigi Prefecture. She was designed in the image of strawberries, which are widely produced in Tochigi Prefecture.

A princess from the land of strawberries, which is said to exist in another world that is not Earth. She came to this world to tell people how wonderful strawberries are. She is especially fond of strawberries grown in Tochigi prefecture in Japan. She appears at events all over Japan to promote strawberries.