This paper proposes a framework for integrating ethics into the requirements elicitation process to build ethically compliant systems. To address the time and resource constraints of the existing manual ethical requirements elicitation method, we introduce an ethics advocate agent in a multi-agent LLM environment to generate draft ethical requirements. Through two case studies, we demonstrate that the proposed framework captures most of the ethical requirements derived from researchers’ interviews and suggests additional requirements, but we highlight the reliability issues of ethical requirements generation and the need for human feedback. Ultimately, we expect that this study will facilitate the development of ethically compliant products by more broadly applying ethics to the requirements engineering process.