(I open a little parenthesis to clarify that my first language is not English, so sorry if there are things badly written XD)
That Gregory's favorite singer is Marina, is not a headcanon, is a fact
Christophe often steals Gregory's clothes and always justifies himself saying "you are rich, you can buy more"
Gregory learned to speak French because when christophe is angry he hurls insults in his language
Gregory gives too many bi vibes and no one can tell me otherwise
cat personality Christophe and dog personality Gregory? of course yes
the greatest artistic process of Christophe is drawing dicks in Gregory's notebook
Anyway, if they are interested (or if someone sees this post) I can tell my au's that I have of them :)