I'm not going to ramble about my story, but I will say one thing that I always find interesting in terms of how it can relate to typology.
As a younger kid, I had abuse coming at me from home and bullying coming at me from school simultaneously, no one had my back, I had to fend for myself in a cruel/fucked up world. That caused me to snap so that I changed my style of dress; the way I carried myself;
the look on my face...not really resting bitch face, more like resting angry face; became less agreeable/more confrontational, rebellious, and fierce; much angrier; stopped trying to fit in and started rejecting everyone; showed off in some ways that made me seem more intimidating. I was sick of all the bullshit and I wanted everyone to know it. My entire presence basically screamed, "either back the fuck off or I will mercilessly fuck you up."
Now, the part of this I think is interesting, is that it was when people changed the style of bullying they did. It became more indirect and manipulative. People were trying to get me into trouble with authorities at school, playing the sweet innocent victim facade card to get me kicked out of places, etc. I remember when I broke up with my first girlfriend (I'm bisexual) because she flashed her breasts to some guys while we were outside in an after school program. In retaliation for it, she cut herself and then said I told her to/made her do it. Since I had this whole “badass” look to me now, I was kicked out. That was not the only instance in which I was fucked over that way by someone. Everything people tried with me in my life from then on was manipulation like this. I began guarding more and more against manipulation. I felt more vulnerable to it than physical confrontation - that was no problem for me, and I defended people from bullies via physical confrontation. I sometimes took bullied kids under my wing and was protective over them long-term, for more than a year. I feared no one. People obviously knew that and saw manipulation as a way around my defenses. Since I had poor people skills, I struggled to build my defenses against it at first, and was genuinely vulnerable to it. I faced it at home from my mother, also. I still to this day feel uncomfortable/in a state of unrest with any home, vehicle, or other need that is not under my ownership, my name, because of those experiences. I want to hold the cards in order to prevent anyone else from doing so in a way that allows them to use them against me.
So...I don't type as E8 because I don't relate well to any Enneagram type strongly enough to have it a core one, but in Enneagram 8s, is it the appearance of invulnerability...