Vex

Vex is a Nord thief and a member of the Thieves Guild in Riften and is the Master Lockpick trainer.

During the quest Loud and Clear, the Dragonborn must break into Goldenglow Estate and raid the safe there, as well as light three bee hives on fire. Speaking to Vex will reveal that she had previously attempted to do the job with Delvin Mallory, but Aringoth, the estate's owner, had stationed eight mercenaries around the land and Vex was wounded in the fight. She will then tell the Dragonborn of a sewer entrance, which will make breaking into the estate much easier.

When prompted, she will give four different side quest to the Dragonborn if he/she is a member of the guild:
 * Burglary jobs
 * Shill jobs
 * Sweep jobs
 * Heist jobs

Bugs

 * Vex may accuse the player of drawing blood, even if the player has not interacted with a single NPC in any way. This is known to have occurred during a heist quest.
 * Sometimes when doing her side quests, if you accept and then decline sweep jobs several times and then accept a new one to actually complete, the jeweled items will still be there and will make it impossible to pick up the quest items. [Bug fix needed]
 * It's possible to remain totally undetected on Heist or Burglary type quests and still fail for being caught, even when no one saw any stage of the crime. (360)