I wrote about it at length before, but I don't think it's true. The only one of the companions I would consider to be more than a level 1 character is Gale, and even he is iffy


Larian's Biggest Oversight, what to do about it, and My personal review of BG3 EA
"74.85% of you stood with the Tieflings, and 25.15% of you sided with Minthara. Good outweighs evil, it seems."