Jan is a world builder and a devout computer gamer. With 30 years of experience in developing tabletop role playing campaigns, he is responsible for the setting and story of the world of Calaval. His medical background helps in fitting together the requirements of fantasy game design and exercise.

Agneta is a specialist in ancient religion and customs. Most of the real world background carrying the world of Calaval and its adaptation to the setting is thanks to her tireless mining of historical resources. Also, as a public health researcher, she sees the role of exergaming in a wider perspective.