The first step in every user centered design process is to build Personas as a base of every communication strategy to other team members and stakeholders. Build up a vision of the Product with personas, sketches and persona driven user stories. Optimizing the process of iteratively adapting at the big picture. Personas give the user a face and sketches of the context of use. A persona helps to empathize with the user, understand user behavior and deeper needs. The integration of personas with the individual user behavior makes the product bulletproof. In the beginning for each user centered agile development process three important elements have to be defined, the functions, the utilization context and the user behavior with the product. The talk demonstrate how necessary personas are for the user centered agile approach. Why personas are the foundation for each usability tests and explains step by step how they create a persona. Developers learn to get a better understanding for the user and their needs. Scrum describes how to organize an agile development process but neither exactly defines how to go on nor the needed tools to make the process user-centered.