Hawkmoth

Harriet Moniker was a short person with a temper to match her height. But being a tiny girl wasn't gonna stop her from MAKING people take her seriously. In high school she wasn't on the hockey team, because she was kicked off of the boys hockey team, after being kicked off of the girls hockey team, because literally being too rough.
Later in life, Harriet started going to the gym daily, and participating in local boxing and MMA events. Got a personal trainer, hit it off with him, and they moved in together. But there was just this... constant annoyance, that nobody was taking her seriously. She was kind of in a weight class on her own, so always fought above her own. And she did good for it! Extra mass is hard to fight against and she held her own, but there was always this feeling she was just the 'tiny girl'. She was ranting about this to her boyfriend while beating on a punching bag, when the punching bag exploded. She just... hit it really, really hard, and it totally burst.
"Holy shit."
The thing about Novas, is the M-R Node, which opens up the capability for superpowers, is already there before you gain them. It's just not 'open' yet. Sometimes, for some people, the energy tries to 'seep' out a bit, providing a brief burst of superhuman ability.
"I'M GONNA BE A FUCKIN' NOVA."
Harriet did what any reasonable person would do in this situation. She went to the local subway station, and jumped in front of a train, thus creating a huge rush of adrenaline, and opening up her M-R Node for good. With superpowers also often comes some change in appearance. If Harriet was gonna gain super strength, surely she'd become huge alongside it.
This was the plan, anyways, before a Nova known as Quickstep came along and rescued her, and gave her a lecture on how many idiots fucking die trying to prematurely 'turn on' their superpowers. Just wait it out. If you're sure you're a Nova, it'll happen eventually.
Anyways, Harriet totally disregarded this advice, and jumped the fuck off of the tallest building in the city.
And this time, she felt it. A sharp pain in her head, followed by a feeling of incredible power. And... the world seeming larger?
Quite the opposite of her expectations, Harriet did not become big and beefy, but rather, small. Real small. Like, a foot tall. This did not make her particularly happy. She hadn't thought of that pixie shit she liked as a kid in YEARS, why would the node focus on THAT of all fucking things? Her mind felt clouded, like not going into a rage was the hardest thing in the world. At the very least, it seemed she could fly, so she took the most direct route home, trying to not think about anything until she could get home to bitch about it to her boyfriend. Her number one way to cool down.
This did not go as planned. Turns out her boyfriend is unable to handle an eleven inch girlfriend stronger than him. And that's why he ended up through a window.

A year or so and some legal proceedings later, these days Harriet is going by Hawkmoth professionally, as a sort of mercenary, because people pay MAD CASH for that and it means she gets to fight a lot.

(she and naisse have similar complaints about how people view them. complaining at each other a lot they totally hook up)

In another world, Hawkmoth is literally a pixie barbarian, which is where most of this art comes from.