Better alone than in bad company: Addressing the risks of companion chatbots through data protection by design.

Recent years have seen a surge in the development and use of companion chatbots, conversational agents specifically designed to act as virtual friends, romantic partners, life coaches or even therapists. Yet, these tools raise many concerns, especially when their target audience is comprised of vulnerable individuals. While the recently adopted AI Act is expected to address some of these concerns, both compliance and enforcement are bound to take time. Since the development of companion chatbots involves the processing of personal data at nearly every step of the process, from training to fine-tuning to deployment, this paper argues that the General Data Protection Regulation ("GDPR"), and data protection by design more specifically, already provides a solid ground for regulators and courts to force controllers to mitigate these risks. In doing so, it sheds light on the broad material scope of Articles 24(1) and 25(1) GDPR, highlights the role of these provisions as proxies to Fundamental Rights Impact Assessments ("FRIAs"), and peels off the many layers of personal data processing involved in the companion chatbots supply chain. That reasoning served as the basis for a complaint lodged with the Belgian data protection authority, the full text and supporting evidence of which are provided as supplementary materials. [ABSTRACT FROM AUTHOR]