Mechanically/narratively, a Tav/Durge PC doesn't need to have been a warlock until the point at which they awakened on the nautaloid. They do not need to have had any prior history with their patron.
Tav has whatever backstory flags come with their chosen background, and Durge has no prior memory anyway.
Last edited by FrostyFardragon; 29/07/23 10:17 AM.