Vil will generally refer to the first-year students by their first names with no honorifics, and sometimes by nicknames. Rook switches between the "-kun" honorfic and personalized nicknames, while Epel has a deeper level to his honorifics than all the other characters.

0:00 - Vil Schoenheit Honorifics
1:04 - Rook Hunt Honorifics
1:29 - Epel Felmier Honorifics