Rowby is the true villain of The Bug Pond
He's always in the background because he wants to lay low. His boat rides are attempts to gain good PR with locals, so they would think nothing of him. And when no one expects it, he'll unleash his master plan! Flash's leather jacket is just an exoskeleton.
He only says it's leather because he can't afford a real one and hopes what he's got now would fool everyone. Kid is Tate's mother
Where did Kid Katydid get all those spider children from? She hatched them of course! Not saying she birthed them, but she could have kept them warm and such. The mysterious stranger will not have any barring on the plot
Maybe the mysterious stranger seen at the end of Masquerade Mayhem part 1 will not turn up at any point in the comic's run ever again. The predators are sentient
Maybe the birds and mammals that Kid fights off can talk to each other like the bugs do, and they are secretly planning to take Kid down for all the meals she's robbed them.