The Dark Carnival
Morgan is a talented protege of Kaelen, trained as a professional dungeoneer rogue to work with advenuring groups. She took him across the lands and into dungeons and tombs she had already been in, most decades before. Any new inhabitants were dealt with. She reset traps and included some of her own, then took him through each one over the course of 2 years. At first she took him through her own past motions, step by step, showing him what she had done correctly and incorrectly. Then, later, she let him take the lead for true on the job training. By the end, perhaps none of his age in the world is as skilled at opening doors, and finding and disabling traps.
He tends to not stay with one group for long, preferring to travel and make many friends.
Most recently, he made a short foray into the dungeon beneath Persukar to the east, which was not his first in that massive complex, but his first without Kaelen as part of the team.
Kaelen received word from Mr. Burns that the various adventurers following the carnival were in short supply of thieves and rogues, especially with Morgan’s main strengths, and requested Kaelen send Morgan to live with the carnival to be available to them when needed.