I found this in a datamined dialogue (UND_PowerOfTrueSouls_RD_Astarion):
If the person you dream of at night is male (tag DAISY_MALE), your main character says “They're too powerful. We have to stop the Absolute and his True Souls.”.
If the person you dream of at night is female (tag DAISY_FEMALE), your main character says “They're too powerful. We have to stop the Absolute and her True Souls.”.
The Absolute's gender depends on who's talking. For example Minthara says She, while Nere (an upcoming character) says He.
Although we knew this already, I thought it was interesting to include. Priestess Gut must be a lesbian then, lol.
Of all the Origins in the game, only Shadowheart has the same dream as the generic PC: unknown person you are attracted to.
Wyll sees an ex-girlfriend.
Astarion sees his master.
Lae'zel sees Vlaakith.
Gale seems to only hear a voice (probably thinking it's Mystra's).
Gut could be seeing a sister or mother for all we know.