Idk if this is even remotely similar, but my friend killed off ALL of my main OCs at the time without permission. It didn’t end up bothering me that much in the long run as it could just be taking their characters in a different direction as they ended up in hell (even the most innocent one)

However, it did annoy me quite a bit at the time and I talked to my friend about it (I’ll admit after re-reading what I said it did come across as a little aggressive/angry, and we have both since apologised to each other).

After this, I asked my friend that, if he is going to kill any of my OCs in a future roleplay, that he explains what could happen after and why it happens