With their hand knive thingies D:

With the pointy rod thing which Moon is carrying, probably.
Seeing as I have no weapons of my own.

The brightness x___X; It makes Espy's eyes bleed.

And all you have to do is shove Espy off a cliff into water.

with their sexiness /shot
With the wolf hat

That sharp looking key blade would do.

With their scythe

Every way there is possible. All at once.

Slowly. Enough said.

death by sparkle

Failing my assassination attempt her guardian sentinels would finish me while she kept them battle capable despite my best efforts and poisons.

She would probably send me those evil red orbs of hers by commanding them with her scythe and annihilate me that way.....while I'm sleeping.

Consume my body in the holy fire of tails.

With their dagger or beast D;

By invading my dreams and making me have such a bad nightmare that I'd end up having a heart attack.

(The eyes, look at the eyes! xD)