@Noggin
Kinda interesting how they still recognized her after all those evolutions
She gained a lot of fear-inducing titles and concealment skills in all those past chapters. And while animals and monsters still can sense her and flee, human senses are much more dull, so for them she's kinda gives out unmistakable awe-inspiring aura of hidden terror and people who meet her in the past (and live to tell the tale) can more or less recognize it.
And yeah, there's not much such unique spider monsters around anyway, so it's hard to mistake her for another spider. Having scythes for a forelegs is kinda dead giveaway.
@sdarkpaladin
She works in mysterious ways. One moment she saved a group of adventurers, another she farms bandits for XP.
She decided to kill only those who attack her. And bandits are basically monsters in human form, legitimate target for both humans and monsters alike. Either way they would be killed eventually, and it's better to do rather sooner than later.