Larian Studios Forums Baldur's Gate III Baldur's Gate III - General A Theory

That's quite an interesting connection.

It is in fact confirmed by the Ruthe (oxen looking animals in Grymforge) that Ketheric Thorm was an elf. Although it doesn't mention which kind of elf, I assume he was a Drow since they operated within the Underdark and Shar is all about shadow.

So the General could really be Ketheric Thorm, who survived the Hell's legion and left Balthazar within the temple. And since nothing in the land is done without the General's knowledge, he seems to have known exactly where to send Z'rell and True Soul Nere and for whom exactly.

Also even his nickname is quite interesting, "The General". Possibly hinting precisely towards Ketheric Thorm's glory days of being a General of the Dark Justiciars.