Jay Jay was a Gungan, and one of the three offspring of Jar Jar Binks.
Following the fall of the Jedi Order, Darth Vader experienced a crash landing on Naboo; soon after, Jar Jar Binks arrived to welcome him, presenting Vader to his children: Jo Jo, Jay Jay, and Jee Jee. The energetic children then jumped upon the Sith Lord, covering his armor with crayon markings.