"Name's Flux. I'm what the HHA calls a 'size-shifting specialist.' Basically, I get big when buildings need wranglin', or small when villains try hidin' in air vents. Downside? My metabolism's a dumpster fire. Gotta eat like a competitive eater training for the apocalypse just to fuel the whole 'grow to kaiju size' thing. Makes pants shopping a nightmare, but hey—saves on gym memberships."

"Off-duty? Marco Fletcher: single dad, burrito enthusiast, and chronic worrier about whether they're gonna figure out Daddy’s the ‘big orange kangaroo guy’ before they turn eighteen."

Is it a superhero? Is it an overworked single dad with a single dadbod? Is it a size-changing macro/micro furry I only realized half-way through is a lot of people's thing?

No, it's all of the above!