Hopper is related to the grasshopper from The Grasshopper and the Ants
He took the ants' food as retribution for them allowing his own kind to starve to death in the cold.- If we consider that the grasshopper is the one from the Silly Symphonies version, we can assume each new grasshopper generation became more and more dependent on the ants, ending up becoming freeloading Jerkasses who are content to mug the ants for their food and, in the case of Hopper, swear a petty revenge on one of them. However, Molt still has the same intentions as that one grasshopper, and that's why he was accepted more than the others.
A spinoff will be produced for Disney+
It will be called "A Bug's World" and takes place 30 years after the events of the original film. It stars the descendant of Flik, who shares Flik's inventive mind which proves useful in a world of changing technology. The miniature realm of the bugs will also be explored further and introduce a variety of new bug characters. Thumper is a locust
It would rather perfectly explain how he seems to be completely animalistic and feral compared to the human-like grasshoppers. Locusts rather infamously mindlessly swarm to sources of food and never stop eating until they run out. Among sapient grasshoppers, a locust would indeed be akin to an incoherent psychopath that attacks anything he's pointed toward with the mentality of an attack dog. Flik is a misplaced drone, not a worker ant
Flik was never meant to be a worker ant; he's a drone who was accidentally placed into the worker caste without anyone noticing the oversight. That's why he doesn't work well with others and wastes his time building inventions instead of carrying food to the nest. He's also the only ant who shows interest in Atta: drones only exist to mate with the ant queens and Atta is a princess. The rattlesnake rattle that mosquitos use as maracas in grasshoppers cantina/hideout belongs to Rattlesnake Jake.
And if Jake ever learns that his rattle is used as instrument, he's gonna be really mad at the late Hopper's gang.