So, I should tell ya this, from now on, some of the Sans' talk will have some sort of difference. Here's what I mean.

When Classic talks
WHeN POsSesSeD TaLks
whEn ErRor tAlKS
When Lust talks~
How 'bout when ta Edgy one talks? (Basically like some stereotypical gangster)
When Horror talks
WHEN THE MAGNIFICENT SANS(Blueberry X3) TALKS, MWEH HEH HEH

Thats how you can kinda tell who's talking more easier. Now for meanings of the initials!

(Y/N)= Your name
(E/C)= Eye color
(H/C)= Hair color
(F/C)= Favorite color
(S/C)= Skin color

Hope this'll help you guys! See ya next chapter~