What is the key feature of a humanoid which communicates daily with people? Previous work showed that a communication robot in an office can acquire familiarity with daily chats. However, the robot could not give familiarity to all the people in the office. Then we have come to conclusion that the robot needs to adapt its behavior appropriately to current situation, have a suitable role for the environment, and give friendly impression. In this paper, we investigate how people change their impressions of the robot if it changes its behaviors depending on the situation or has a role (or a job) in an office.