‘H’ is for ‘Humans.’
A historically underachieving species, they were widely regarded as a knock-off of the triclopes. As opposed to the triclopes, they have only two eyes, possess weak senses of taste and smell, have particularly weak hide and muscle tissue, heal very slowly or not at all, gestate for less than a year. People who use economic trends to study the world cannot fathom how cyclopes can be so enormous and durable when, eye-wise, they ought to be the next step down from biclopic humans. People who use economic trends to study the world and phrase things more sensitively believe humans achieved their modern dominance by gestating so quickly, thus flooding the market with their brand.
After imps managed to conquer the known world, it shouldn’t have been a surprise that humans could. The bar for domination was low enough, and they were a hungry enough species to try science again. Most species thought, given that science had literally eaten the Gremlin Empire alive, it was a bad idea. Humans considered that a very interesting philosophical point that they’d think over after using science to conquer everything. It’s worked out well so far.
It’s an unwritten rule of many universes that humans make great protagonists. It’s unknown as to why, but humans are prone to heroism, if for no other reason than because if another species did it instead then humans couldn’t be the center of attention, and that’s unacceptable in fiction. Humans are even the protagonists in most Godzilla movies, to the chagrin of everyone who enjoys Godzilla movies.