she said it's a different kind than the red and orangey(?) ones
There are two different kinds of the butterflies. The red one's and the purple one's. I think she's using the red one's to sneak info, and as they've said she has trained the purple one's to kill.
In the chapter 22, where the purple ones appeared, she says that these aren't the ones raised to kill
Oh my bad, I read it wrong then haha (￣∇￣")
ok but why the butterflies purple now