Born on Yardrat, Arthur’s original name was forgotten after negligence brought him to only be educated enough to say the word “Yup” to communicate with. Considered dumb and useless by his peers, Yup was dumped on the first set of space travellers that were willing to take him. This being Jocaron’s crew, who was on their way to fight Chillzen.

Yup was adopted by Master Cailan Donshi (Later called Goromaru) as both a student and a son. Donshi educated Yup in order to help them read, write, speak and fight, finding them to be quite proficient in all of them with the right instruction. Now named Arthur, Arthur works as an instructor at the Dragon School who helps ease alien visitors who come by the dojo into learning about Earth’s culture.