Hannibal considered her questions for a moment, wanting to give her an honest answer regarding his own transformation. There was only one answer really.
"My Wolf and I are two parts of a whole, neither can exist without the other and so they work together in harmony to present the man you see before you. No matter my form, I am the same person. No matter the species, everyone has primal impulses. Ours are simply more noticeable as the transformation is rather obvious" the Doctor stated clearly and concisely his own experience with his 'animal' as Rajani had put it.