The development of new media has created a virtual interaction space that enables the formation of social reality and collective behavior on a massive scale. This study aims to analyze the process of social construction of reality built by Windah Basudara and its impact on the
collective behavior of subscribers in virtual trends on the Roblox platform. This study uses a qualitative method with a content analysis approach, supported by observations through YouTube live streaming, in-depth interviews with active subscribers, and cross-platform documentation. Data analysis refers to Peter L. Berger and Thomas Luckmann's theory of social construction of reality, which includes the stages of externalization, objectification, and internalization. The results show that Windah Basudara externalizes meaning through symbols, jargon, and repetitive communication rituals, which are then objectified into collective norms and practices within the virtual community. The internalization process is evident in the absorption of virtual social reality into the identity and communication patterns of subscribers, both in the digital space and in their daily lives. This study confirms the role of influencers as agents of social reality construction in the new media ecosystem.