It’s not so much a whole different personality, but I certainly show a completely different side of myself to my parents than with my friends. I’ve noticed that there are some people with strong personalities who seem to treat everyone the same way no matter what. I’m the opposite. I don’t have the same relationship with any two people; I negotiate boundaries with people individually. In a mixed group setting, that can become real tricky to keep track of. Not sure if this is a neurodivergent thing but I would guess so.