an E8 kid probably grew up in a dangerous environment or a violent household. Or even if they grew up in a normal household , very early in life they understood that the world is an unfair, unsafe place so meek, weak people don't make it; the thing that matters the most is survival. As a kid they might have felt like it's not okay to feel pain, be weak & vulnerable. It's likely they were betrayed by an adult figure and came to believe that people can't be relied on. They were adventurous kids & frequently got into trouble , when they were punished for it( sometimes unfairly) the kids defended themselves, they fought back, they felt like if no one defends them then they themselves will. This E8 kid was the black sheep or scapegoat child of their family. Just like E1 kids they were forced to grow up quickly. The more rejection they faced as kids the more they hardened their hearts. The innocence of a kid was lost very early. Mostly it's the betrayal, unfairness & rejection they experienced in childhood. The child knew the world is cruel , in order to survive you have the protect your feelings, be bold & assertive. It's likely they lacked protection, even they were a small child they liked to see themselves as big & powerful to defend themselves against it. Growing up the E8 child might felt like one day they will avenge the unfairness they were experiencing.