Halsin and Jaheira Secret Dialogue - Baldur's Gate 3
If you take control of Halsin you can have him talk to Jaheira and they have some unique dialogue where they speak about the Shadow Curse and their shared history.
spoilers for the end of Act 2
I did this in Wyrm's Lookout at the start of Act 3, so it's a bit weird because at this point I'd already both infiltrated Moonrise and stopped the Shadow Curse... but it's still nice to see these two old druids acknowledge that they crossed paths one hundred years before, and that they have so much respect for each other.