This really does sound a lot like how my characters both approached HK-47 in-game:
His red-eyed devotion to evil helped frame the wonderful paradox I created. The artist formally known as Revan the Butcher was now helping Twi’lek strangers pass dance auditions. HK-47 was expecting murder, force-choking and vengeance – instead, he got the Light Side Dalai Lama. A man who cheerfully crossed time and space to rehome Gizka. Looking back, it must have been an special flavour of hell for HK-47. He knew Revan when he was the Dark Lord of the Sith. It was like the worst kind of jock reuniting with his childhood bro, only to discover he’d started an organic Kombucha bar called Teasy Lover.
As you may have gathered, I tend to run what Jack in Mass Effect 3 called Queen of the Girl Scouts characters. And I must admit; I enjoyed annoying HK-47 with that. Particularly since I was also aware that I was still killing ridiculous amounts of people anyway, only they were bad so it was all OK. So it should have been OK with HK-47, too. A shame that it wasn’t…
PS: Yes, of course I played the fan-repaired version of KOTOR II. I have some experience, thanks.