Aigis, also known as Unit 024, is an anti-Shadow suppression weapon in the Persona series, specifically in Persona 4. Created by the Kirijo Group, she is an android with human-like features, designed to combat Shadows. Her role expands beyond combat as she develops human emotions and builds relationships with the game's protagonists. Aigis is characterized by her determination, loyalty, and curiosity about human nature. Her journey involves understanding her own identity and purpose beyond her initial programming, making her a key character in the narrative.