This chapter begins with a discussion on ethical foundations, societal roles, and normative frameworks relevant to the responsible development of AI systems. It then explores artificial moral agency, examining whether and how AI systems can be designed to make morally informed decisions. Building on this, the focus shifts to design considerations for transparent and fair AI systems, guided by ethical norms and technical standards. The chapter also outlines the conditions necessary for trustworthy AI, emphasizing alignment with societal values. It concludes by addressing legal implications, including data protection, intellectual property, and new regulatory obligations under frameworks like the EU AI Act.