Cosplay is one part of Japanese pop culture in the world, as well in Indonesia, and it has a lot of fans here in Indonesia especially among teenagers and young adults. This fans of cosplay formed a place called Cosplay Community, and the fans expected the community to help them know and interact with each other so they can help one another. These interaction of their can influence to form a person’s identity, although it was possible that this identity formed before the said person goes to these community and influence with the interaction inside. These identity formed according to the theory of social reality by Berger, which is divided into 3 phases of the identity process is formed , that is is externalization, objectivation, and internalization. The research method that is used isqualitative method with case study approach and the data will be collected with in-depth interview, observation, and documentation. The result of these research is that cosplay’s pop culture of the member of Lunar Cosplay Team Bandung was formed and influenced by the role of production resources cosplay, costumes and accessories, even, as well as cosplay role in their daily lives.Externalization of informans obtained by subjectivity’s desire for their favorite character’s selection then realized in costumes and accessories as a reflection of the character and ends when they do show off at an event or a photo session. While objectivation of infroman obtained from things and/or benefits earned from when they do cosplay activities. And lastly, internalization of informant obtained from a meaning of cosplay for themselves personally.