I heard that Larian made some characters immortal and removed the attack option in some dialogue.

The character that I want to point out is Astarion.

Before I go any further, no I'm not interested in any opinions on social themes. I will ignore them all.

My problem is that he is a Vampire. Spawn or not. He is immune to sunlight, can go anywhere without invitation, and has no problem eating anyone or anything. Due to this I always like the option to kill him off. I admittedly love roleplaying and I can't, in good conscious, let him live. How would my character even sleep with him nearby? Please don't expect me to just trust the vampire, the seemingly chaotic evil vampire, to not attack on a hungry night. This actually gives me anxiety. I don't care what anyone says. I won't rest easy at all. Pushing him away from the party is not enough since he will prowl nearby and now have motivation to attack my party due to rejection. Making things worse. Even if I was evil, why would I let him walk around? An unpredictable tool of destruction would not be wise to let loose.

All I ask is to keep the ability to remove characters from my playthrough's.

I know someone will comment on how I roleplay. This game is all about roleplaying and that's how I play. Intensely. If this is not possible then that's fine. I'll just pass on this game. I try hard to avoid stress and anxiety has given me trouble in the past from the most unlikely places.

Normally vampire themes don't bother me because either everyone is one, you are not something a vampire can eat (like a werewolf usually), or they are monster enemies to be killed. No way I'm doing "humans are friends, not food" nonsense. Especially considering his party banter.

Some say that's what makes him interesting, I'd say letting him be in the party let alone living is immersion breaking. I'm not telling anyone how to play their game. I just want to be able to play my way that I enjoy. That would be not "looking over my shoulder waiting for an attack when I'm vulnerable". Sleeping would be out of the question and after every combat encounter too. Bloody and wounded. To many opportunites to strike for a sun immune vampire that can go anywhere and eat anything.

Sorry for the rant.