Drow Noble

1. You bested one of your siblings in a contest of youth earning you the particular animosity of one of your siblings

2. You covered up the rather public error of one of your siblings, earning you a favor (The real currency of Drow society)

3. Despite being born as a third son to the Matron Mother of your House, you were spared from the normal sacrifice to Lolth, and have some dread but as yet unknown destiny.

4. As a child, fleeing the harsh discipline of your older siblings, you discovered a secret hiding place within your House compound which may prove useful in the future as a hiding place for loot, location for secret experiments, or even a bolt hole.

5. You observed one of your older siblings meetings secretly with a member of another House and overheard something you were not meant to know, gaining you some secret leverage over that sibling in the future.

6. One of your siblings perished under mysterious circumstances; you may be responsible yourself or know who was.

7. You gained the favor of the Matron Mother of your House for some display of minor cruelty or malice, but are now expected to live up to her demanding expectations.  Failure could have dire consequences.

8. On a whim you spared one of the House servants from death, and now have a secret ally within their ranks.

9. One of your siblings has a particularly nasty food allergy.  Unfortunately for them, you know what it is.

10. You have been betrothed to a member of another Noble House.  The Marriage ceremony can not be delayed indefinitely.

Most lesser species inhabiting your city give you wide berth given the Drow Nobility's propensity for sudden and unpredictable violence.  You have advantage on any Social skill role checks (Persuasion, Intimidation, etc.) when interacting with any of the more common Underdark servitor types such as Goblins, Orcs, Bugbears, etc.