Prior to Jool's first appearance one of her cousins, who was revived shortly before his death, referred to her as Jool rather than her full name. John Crichton originated the shortened nickname "Jool" on-board Moya, and though she resented it at first, it soon grew on her, as did he. While an intelligent young woman, Jool has led a sheltered life, and though she possesses a lot of knowledge, it was rarely practiced before joining the crew who soon became her friends. Jool comes from a peaceful star system far away, and before meeting Rygel, she had not known Hynerians existed, though Sebaceans are familiar to her. When frightened or nervous, her orange hair (which sheds) turns red and her high-frequency screams can melt metal, an ability which proves useful on several occasions. Her arrival aboard Moya came with the loss of Pa'u Zotoh Zhaan, and the crew and fans alike were a little slow in accepting the new character.