Wesley Crusher

Wesley Robert Crusher was a 24th century human male and secondary protagonist introduced in the Star Trek: The Next Generation pilot Encounter at Farpoint.

He was portrayed by Wil Wheaton

Wesley was born in 2248 to Jack and Beverly Crusher. Jack was away from home most of the time due to his duties in Starfleet. Jack was killed in the course of a mission while on the USS Stargazer, and his body was brought back home to Wesley and his mother by Jack's friend Captain Jean-Luc Picard. Wesley would not reveal that he was angry at Picard for many years for having survived while his father had died.

At an early age Wesley showed considerable aptitude, and at a young age expressed a desire to join Starfleet. While on the Hood Wesley became friends with William Riker, and asked him many questions about Starfleet. Riker noted this, and further noted that Wesley listened to his responses.

Wesley came on board the Enterprise with his mother, and encountered Picard for the fist time in nearly a decade. When Wesley helped bring the Enterprise back from the edge of the galaxy, Picard decided to name him an acting ensign.

For the next three years Wesley worked often in engineering or at the conn position before leaving for Starfleet Academy. His promising academy career was sidelined when he participated in a prohibited flight manuever which led to a reprimand and being held back a year.

Wesley became increasingly disillusioned with Starfleet as his graduation from the academy approached. After the Traveller assisted him to have a vision from his father telling him to follow his own path instead of his father's, Wesley resigned from Starfleet and went off to develop his abilities as a traveller.

A few years later Wesley was present at the wedding of Deanna Troi and William Riker, wearing the dress uniform of a Starfleet Lieutenant. He was assigned as assistant chief engineer of the USS Titan.

Alternate Realities
In one alternate universe, Wesley had returned to the Enterprise by 2370. By then he was a full lieutenant and was head of security and tactical officer after that universe's Worf was promoted to first officer.