Personality
Leslie's wild, unpredictable, and brash. He's got a good heart deep down, at least his family thinks so, and he does at points as well. But these new powers are both intoxicating and overwhelming, and he finds himself terrified of what he can do and uncontrollably eager to find out. It's a heady combination, and deep down he's looking for someone to help him handle these new realities he's been thrust into.
Background
Leslie was born to upper middle-class parents, and had if anything, a lax and forgiving upbringing. This led to him acting out, breaking rules, and getting a craving for being the center of attention. And so after years of being the class clown, the problem child in elementary and high school, he acted out more than ever before.
But how was he supposed to know climbing a cell tower in a thunder storm as a social media stunt could have consequences? Certainly no one expected the ones that arose, what could have been a devastating tragedy left him with new abilities, a new appearance, and while he might not admit it, new confidence. If anything he's overconfident, the very definition of brash, under-trained powered boy. Of course, this likely means he'll come to the attention of those who can train him, though he's not really thinking about it yet.