To Alastor: What is your favourite animal?

Alastor: Deer is kind of my family's brand, since its part of our name.

Vincent: How the hell do you get 'Deer' from any part of your name?

Alastor: ... My surname is Delabiche

Vincent: ...

Alastor: Ugh, I forget how uncultured you are sometimes. Darlin', Biche is the french word for 'Deer'.

(Delabiche literally translates to 'of the doe'. Alastor's mother also is called Doe (Dorothy) so she used to call Alastor her little fawn)