Petroller: Altering the Virtual Reality Controller with an Attachable Prop-based Haptic for Embodied Virtual Companion

Previous studies have explored various forms of virtual companions, including displaying companions on flat screens, headsets, or the embodiment of their physical bodies.Although most studies use additional devices to enrich sensory feedback to embody the virtual companion in a virtual reality (VR) headset, it requires electricity to activate.We present "Petroller," an attachable mechanism that embodies a virtual companion by altering the built-in VR controller with the prop-based haptic, allowing users to hug, pat, and exercise together.Additionally, we designed two usage scenarios: pet companionship and rehabilitation exercises.We aim for users to interact with the Petroller by pressing and stroking, providing relaxation, emotional healing, and even promoting physical exercise.