So i have benn rocking my brain how to roleplay a specific scenario in one of my d&d groups for almost a moth now and got nothing, so i came for advice,

So int his game i play a changeling warlcok, who is a really petty criminal (a drug dealer). His biggest goal is to gather money to life a comfortable life. He is on a quest to rescue his rich client (who is somawhat of a friend for him,) for money. You understand him, he is just a miserable person who would sell you if you could, tho lately being better and better thanks to the part'y paladin.

So there's player A who was a warforged. He use a wish to know everything about me, so he gained the knowladge of my life so far. That alright we had a little banter, but mainly i was entrusted to the paladin as my babysitter,

But at one point palyer A's character dies(it was kinda weird death too), and he switched to another character who is also a warforged. And he also knows everything about me. Moreover this character feels like was designed to hate me. He hates changelings, he hates warlocks and he is a huge justice lover so he hates a criminaly. After meeting him, we have spent almost an hour of him berate and threaten to kill my character, while the group was trying to calm down my character. After that everytime i was trying to do something he said something along the lines of "One wrong step and i kill you".

How the hell do i rollplay with that without making it pvp or leaving the group? Like i have no idea how should i just roll with it, because i kind not really fun

To clarify can i solve this before making it a confortation with the other palyer, and if yes how?