Throughout Baldur's Gate 3, you will spend time with a strange skeleton at camp. He's called Withers, and not much is known about him other than the fact he can respec your class and summon the dead to fight for you. But given his scene at the end of the game and the tomb you find him in, there's clearly more to Withers than meets the eye.
In a breakdown on the Baldur's Gate 3 subreddit, HowdyHangman77 put together all the evidence for Withers being Jergal, the Lord of the End of Everything, a lawful neutral demi deity preceding Bhaal, Bane, and Myrkul, the Dead Three.
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"Here's what we know: Withers has a divine aspect (DC20 roll by any paladin); Withers has infinite health (inspect); Withers was buried in a temple of Jergal; Jergal is the Scribe of Souls, and Withers identifies as "a mere scribe"; Withers speaks as if he is ancient; Jergal's power was ceded to the Dead Three, and Withers constantly chastises the Dead Three throughout the story and epilogue; Withers directly opposes Bhaal in the redemptive Durge story after the Durge denies Bhaal; intervening in a divine manner and commenting that he's generally not supposed to intervene so directly; if Tav is a cleric of Kelemvor, Withers comments that you too walk with death [...] Withers exercises divine power over vessels, death, and reclassing".
If that hasn't swayed you, results from data mining might. 'CHA_Crypt_Jergal"'s description reads, "Jergal is emotionless and excessively formal, both resigned to his fate and that of others. He is here to assist the party because that is his divine oath, not out of any true desire to act. Players can attempt to goad or attack him, but to minimal effect, as
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