It’s gotta be Bunsen. Even back at the beginning of the comic, Bunsen was trying to dissuade Binky and Mustard from investigating Platt’s peanut factory.

@Ally Uhmactu

Yeah we don’t know what’s going on in Echo’s head, but that is a mystery. We’ve seen some of Mustard’s motives for vigilantyism, protecting mcbell, helping her sister. Hell, the very fact that she joined the corps because of her sister probably threw her for a real loop. We may not have known that mustard would become a vigilante previously, but events changed that. We may not know what Fuscia will do or want in the future, but in the present there is plenty to indicate that she wouldn’t want to be a mole.

@Fellow: I do so hope you’re right! But: her behaviour MIGHT have been camouflage (even if it is unlikely, I agree). And for motivation: I’ve given up on trying to figure that out quite some time ago. I mean, who’d have guessed Morgan turning into a vigilante? Why did McBell join the heist, risking her career and newfound friends? Why did Maggie turn on the Corps in the first place and what is her deal now that she’s free from Ringmaster?

I mean, that or Oats. Mustard probably thinks Oats is STILL the mole, despite everything. Which is bad. And not good. Regardless of if it’s true or not.

It wouldn’t be the first time she’d decided to solo the Mime

It really doesn’t fit the rest of Fuscia’s character. Her thing against killing, her remembrance of the original purpose of the clowns, the fact that she seems to be very much still trying to do what she set out to do in clown college.. We’ve been given too much insight into Fuscia’s motivations for it all to be an act, and why would the Fuscia we’ve seen join up with the circus?

No real damage?
Poor mustard just went from grains to powder in that last one, gonna need a new ribcage in the best case scenario.

Right! And brought it to perfection!

The peanut factory points to Doc or Bunsen, especially since Bunsen tried to downplay the information, IIRC. But the hand cannon is Fuchsia’s (unless it was provided to her by the Shadow Circus scientists!). Personally, I’d be devastated, but Fuchsia being the mole would be so much more dramatic…!