Characters/adults

To make reading easier, this page is split up in two sections:
 * Monster High staff - The staff and associates of the titular high school, regardless whether they teach or fulfill another function, regardless when they were associated with Monster High, and regardless of the fiction they appear in.
 * Other adults - All the individual, adult characters that appear in Monster High, but aren't related to the school.

All characters within a section are listed alphabetically.

Laboratory assistant
The laboratory assistant is a green-skinned cyclops with red hair and a balding top. He assists Mr. Hackington in "Hatch Me If You Can" by getting eggs for the students. He only appears elsewhere in "Flowers for Slow Moe".

Lagoona's teacher
A teacher of whom only the voice is known, he was heard in the webisode "Parent-Creature Conference". Lagoona Blue is his best student, so much so that he personally wished to tell her parents. Since Lagoona's favorite subject at school is oceanography and no other teacher is confirmed to handle those lessons, it is possible he is the oceanography teacher.

Tall lunch lady
The tall lunch lady is seen in "Just One of the Ghouls" and "Creepateria".

Phantom of the Opera
As said in Holt's Basic diary, Operetta's Campus Stroll diary, and the game Ghoul Spirit, the Phantom of the Opera teaches a keyboard class.

Siren
Mentioned first in Holt's Basic diary, there's a siren at Monster High who gives voice lessons. The Monster High magazine issue of May 2013 revealed her name to be Ms. Siren and her class Voice Training.

Superintendant Petra Fied
Petra Fied is a mummy, and the Skullastic Superintendant in charge of the local district. She appears in the third Ghoulfriends Forever book, where she keeps an eye on things when Headmistress Bloodgood is kidnapped.

Scariff Fred Onarrival
Fred Onarrival is a zombie, and the Scariff -Sheriff- of Salem. He appears in the third Ghoulfriends Forever book, where he tries to keep order after the town is panicked from threats by normies. He uses a bullhorn which can translate zombie speak into English to order his deputies around.

CeeCee Thrue
CeeCee Thrue is a ghost, and the best photographer in Salem. She appears in the third Ghoulfriends Forever book to takes the students photographs for Picture Day. She acts very much like a rock star diva, wearing leather, demanding others get her coffee, and rudely telling her subjects how to pose for her pictures.