Originally Posted by MelivySilverRoot
Someone gave the information on Reddit about that : https://www.reddit.com/r/BaldursGat...aled_characters_will_only_be_companions/

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Translated quote:

Swen Vincke told us, that Minsc (and Boo) and Jaheira can be recruited as companions, but they can't be played as an origin character, like you can do with Astarion.

Oh man, if that means that only origin companions are locked after the first Act, but we can get non-origin companions after, that'll be wonderful! Just ignore the origin companions and hook up with the good companions and not have to gimp my party.