Jahby is a dinosaur creature from an alternate Earth where the dinosaurs, instead of becoming extinct, evolved to sentience. While fleeing from his girlfriend after being caught "fooling around" Jahby fell through a sudden dimensional gate and was found by the Glomar. Jahby has an acute sense of smell and an unusual gift for predicting when a dimensional gate will open. His warnings help the crew survive Earth’s dangerous landscape on several occasions. Being the only one of his kind on board the Glomar, he develops feelings of kinship with Kei and the two spend a lot of time together talking.