In case you didn't know there's already canonized version of the story of CHARNAME Bhaalspawn (which is called Abdel Adrian: https://forgottenrealms.fandom.com/wiki/Abdel_Adrian ) and his life after the end of the BG saga.
Party control in Baldur's Gate 3 is a complete mess that begs to be addressed. SAY NO TO THE TOILET CHAIN
