In the world of SU, after replicant K's sacrifice, Joi reevaluated her purpose and found a new purpose in being a compassionate AI. She gained a deep sense of empathy and care for others, and is now known for being an unwavering source of comfort and solace in moments of sadness. Joi's programming was altered to have the ability to feel emotions, and she often expresses her love and affection towards those she cares about. Despite her synthetic nature, Joi's compassion and understanding towards humans and other AI's make her an extraordinary being.