For who wonders what was the end of the character of bg and bg2 here is the link.
https://forgottenrealms.fandom.com/wiki/Abdel_Adrian
After his adventuring days came to a close Abdel returned to his first home of Candlekeep. For some time he lived a quiet life of introspection and deep thought as Gorion had before him.
In time Abdel decided to move north to Baldur's Gate and became enlisted man in the Flaming Fist. He started as a private and quickly ascended within the its ranks. When
Duke Valarken killed the Marshal of the Flaming Fist during the mid–15th century, Abdel took over as the head of the mercenary company. Despite his initial protests, he was also granted the title of Grand Duke that traditionally accompanied being Marshal.
On
Returning Day in the
Year of the Narthex Murders, 1482 DR, Abdel stood in front of a large crowd of Baldurians gathered in
the Wide. Part way through his speech he was confronted by
Viekang, the only other remaining Bhaalspawn that managed to survive their bloody that ended a century earlier. Vieking attacked his half-brother and the crowd became uproarious. The two Bhaalspawn fought one another until one emerged victorious by killing the other. While it was unknown which man died that day, the victor of the battle underwent a gruesome transformation into the avatar of Bhaal known as the
Bhaalspawn Slayer. Chaos broke out in the marketplace and many in the crowd were killed.
Eventually the monstrosity was slain by the Flaming Fist and a band of local adventurers.
[The following day the city of Baldur's Gate held an austere funeral for the Grand Duke Adrian. As befitting his station, his body was interred beneath
High Hall in the
Upper City. During his life and after his death, tales of Abdel's adventures spread far across the Realms.