An experiment was conducted on social agents, which support networked community to communicate about social issues. Selected shape of social agents is animal-like ¡Çcharacter agent¡É which expresses the emotion by gesture and synthesized voice. The roles of the character agents are ¡Èavatar¡É and ¡Ènavigator.¡É ¡ÈAvatar¡É is the substitute of a user and ¡Ènavigator¡É is a supporter of each user. A communication system was developed implementing designed agents, named ¡ÈSym-bio Community System.¡É This experiment was conducted for discussion on social issues. As a result, we found out that participants had the image of ¡Èaffinity¡É for an avatar and ¡Èusefulness¡É for a navigator. And, the image of ¡Èusefulness¡É for a navigator by participants correlated positively with the evaluation for the networked community by participants.