Ellen Joe is a central character in the series Zenless Zone Zero, known for her intelligence and resourcefulness. She is part of a group that navigates the chaotic urban landscape of the city, facing challenges and mysteries that arise from the enigmatic zones. Ellen's role is pivotal as she often acts as the strategist, using her keen insight to solve problems and guide her team through perilous situations. Her calm demeanor and sharp wit make her a respected leader within the group, contributing significantly to their survival and success.