Cassandra lived in a rural Indian village near New Delhi. She learned the art of enduring pain through enlightenment practices, despite girls being forbidden from such religious sects. To receive training, she disguised herself as a boy among a group of fakirs. Aware of her true gender, the fakirs permitted her training, anticipating her eventual failure as amusement. She succeeded in every challenge over many years, ultimately frustrating the fakirs to the point they expelled her, accusing her of deception. Years later, Arman tasked Cassandra with instructing Bruce Wayne in mastering pain control. Over several days, she put him through exercises like sleeping on a bed of needles and standing on hot coals without visible reaction, focusing on minimizing physical suffering through mental discipline. During this period, several young men harassed Cassandra. She endured their blows without showing pain. Bruce intervened, defending her with martial arts and demonstrating his own pain tolerance. Cassandra then declared his training complete and instructed him to leave. She observed that Bruce carried a profound inner pain beyond her ability to alleviate, noting this pain seemed to drive him toward a chosen path.