Nowadays, Anime, manga, and Japanese game have entered the life of Indonesian youth. One of this Japanese pop culture’s impact is the birth of cosplay. Cosplay is the act of wearing costume of certain character and then play as him or her, it is an act of embodiment which has been closely linked to the presentational of self. This embodiment of played identity, the interaction happened inside a cosplay community and in public occasions are believed by the researcher as some factors that can influence a cosplayer’s real identity. So in this research, the researcher would like to know about how does cosplay’s communication behavior hold an important role in constructing a cosplayer’s whole personal identity. This research uses the qualitative approach with grounded theory method. Data collection is carried out through field observation and in-depth interview as the primary data and literature and document study as sources of secondary data. The cosplayer’s that become the informants are selected based on the criterions that have been created for purposive sampling. From the research, it can be seen that the cosplay identity with its characteristics influence the cosplayers’ personal identity and it relates to the gradation of identity as a proof of identity negotiation process. The result also shows that cosplay enhances self-development in the area of communication, art, and social skill for those cosplayers who could balance their intercultural competence.