Heya, I decided to start a run of original GoG unmodded Baldur's Gate today, on a nostalgic impulse. I just played to Nashkel with the "canon" starting party of Jaheira, Khalid, Montaron, Xzar, and Imoen. I'm playing a half elf fighter-cleric. There's a lot I really like about the original game over the EE's, (Jaheira's Entangle spell is party friendly!) but that's another topic, maybe.
I had kept the evil duo with me much longer than I usually would, roleplaying that my wise lawful good paladinesque fighter-cleric would think that they were needed. Xzar's Larloch's Minor Drains had helped us on several occasions against very dangerous enemies, as had Monty's crossbow. ("Missile Weapons" proficiency gives flexibility for crossbows and darts, not just slings, yay BG1 weapon proficiencies!)
Because of several completed quests, our reputation was pretty high. I noticed that the character dialogues seem to trigger much more often in original BG1. I had already gotten Khalid's (paraphrasing) "I don't mean to be a bother, but... umm...could you be less... I don't know... um.... evil" three times. Once was to Xzar, where he got "Will you continue to bother me, or shall I indulge my sweet tooth?", and twice to Montaron, getting "Will ye shut up, or must we come to jabs?" I had also twice gotten Jaheira saying to Xzar "You're very amusing, in a 'What the hell is wrong with you?' sort of way," with Xzar once responding "Be quiet, ye annoying harlot."
Then, when I went up to Minsc, and booted Xzar and Montaron at the same time, I got these parting threats instead of the dialogues I had always seen before, and I assume these dialogues mean they are now gone forever from this run:
I don't know if it's visible in the screen shot, but I had roleplayed that Xzar had a fascinated attraction to the ogre's shiny, gold-plated belt, and had insisted on taking it for his and putting it on, becoming, Xzarina. And he was fine with that.