If ever my drow Tav was a BG3 companion, he'll have two possible fates:
The Blue Ending has him give in totally to his good compulsions and become a Silverhair Knight for Eilistraee, swearing to protect his fellow converts and to uphold harmony among drow and other folk.
The Red Ending sees him become a Crusader of Vhaeraun. Ultimately, he becomes one of his top enforcers, seeks out revenge on House Everhate (who destroyed his family), and takes an active part in establishing a drow-led society on the Surface.
In the Blue Ending, he weilds T'zeklochar's scimitar, Reckoning. In the Red Ending, he weilds Nalaghar's flaming scimitar, Grief.
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