Catgirls probably definitely get the sneaky parts of the cat. How else are they supposed to hunt for food if they're not sneaky? You can't just snatch food off of someone's plate if they're looking at you, after all.

Lucky Charm doesn't nod.
Nodding would be bad, actually. In fact, speaking could be bad because it would move her jaw and maybe even other parts. Instead, she just makes an 'affirmative' grunt to Honeysuckle.

Getting possibly paralyzed is worth the risk, is what she thinks. So it's really just a question of how much she trusts the foxgirl to have double-checked Marin's work after she worked the contraption.