Sean was a Padawan of the Jedi Order, a male human, and he existed during the period known as the High Republic Era.
Born circa 217 BBY, Sean was brought as a young child to the Jedi Temple situated on Coruscant. Along with numerous other younglings, he underwent training under the tutelage of Jedi Master Oslord. It was there that he commenced his Jedi training, however, his aptitude with the Force consistently lagged behind his peers. Around 203 BBY, at the age of fourteen, in what was perceived as a somewhat contentious choice within the Jedi Order, the renowned and exceptionally skilled Jedi Master Mostima accepted him as her Padawan learner. She justified this action by asserting her superior ability to nurture the Padawan's development.
In 200 BBY, he and his master journeyed to the world of Begamor in order to deal with the planet's corrupt president, Jamie Brasson.