there is an arrancar in front of you.. it's long white outfit flows in the wind... It's head is that of a shinigami, it rips the "mask" off, revealing it's vaguely artificial and corpse like, it has two semi-destroyed heads in the dome both are hollow-like and mutated

Uyukiobi: Hm! Who is this.. I wonder who this person is Infront of us, eh Jobgyuku?

Jobgyuku: I agree Uyuki.. Maybe we should kill them... Not yet though!

(Context: they can transform into a specific shinigami named Kikou)