Main Staff and Alumni
A mysterious, unnamed bus driver smoking a cigar who seems to know more than he reveals and constantly shows up to offer advice to Tsukune. He is the one who requests Mikogami to help keep Tsukune's ghoulish nature at bay. It is unknown if the bus driver is human or a yōkai, but he does have an extensive knowledge in the supernatural, having identified the Lilith Mirror as the cause of the uproar during the school festival. He happens to know Mikogami, one of the three Dark Lords, personally, and has the same creepy glowing orb eyes as the latter. He also knows that Tsukune is a human, and it can be assumed that he himself is a powerful monster.
Shizuka Nekonome is a catgirl and Tsukune and Moka's homeroom teacher. She is also the advisor for the Newspaper Club. Nekonome is rather carefree in her attitude and somewhat oblivious to certain things. The manga reveals she likes to eat raw fish, but specifically goldfish. A running gag in the anime is when she is reminded by one of her students about her tail showing, which would always embarrass her. Her animated counterpart does not seem to show any hatred towards humans, unlike the rest of the teachers in the school. This is particularly shown prior to Tsukune's execution incident, when she worries about his fate and argues how the school was built to promote human relationships with yōkai and vice versa. She is also said to own a villa in the human world. Despite her physical appearance being in her early thirties, she claims in the second serialization that her real age is 17.
Ririko Kagome is a bespectacled math teacher at Yokai Academy and a lamia appearing in chapter 12 of the first serialization. Seemingly innocent and deeply concerned for her students' grades, she offers private lessons to anyone willing, though at a price (according to Kurumu, Ririko tends to go overboard with her tutoring, and envies her for her large breasts). As such, she uses her abilities to drain her students' emotions in exchange for knowledge, which is done through a flower-like appendage on her tail. She also seems to have a fetish for S&M outfits, claiming that it makes her male students "work harder". However, this might be only what she thinks in her warped mind. In both the manga and anime series, Ririko tries to enslave Tsukune when he is forced to have tutoring by her in order to correct his failing grades in math, and believes that Moka is in the way of his studies. But when Moka attempts to rescue him, Tsukune snaps out of Ririko's control long enough to remove Moka's rosario, leading to her defeat by Moka's vampire form. She reappears later in chapter 19, apparently not holding a grudge, to warn Tsukune and Moka about Okuto Kotsubo. While she no longer bears a grudge against Moka in the manga, her grudge against her remains in the anime, shown when she attempted to take Moka hostage only to be stopped by Nekonome in a catwoman costume. Also, her anime incarnation is slightly more perverse than her manga counterpart. It is important to note that unlike other antagonists, she is not inherently evil, but rather very passionate about the education of the academy's students as well as the status between teachers and students.
Public Safety Commission
The Public Safety Commission is a group of enforcers on school grounds charged with protecting the academy. These members use their status to their advantage, similar to hall monitors, and anyone who opposes them is delivered swift punishment through methods of imprisonment and torture. They collect tribute and bribes from clubs, and if they do not pay, they will be shut down. The Public Safety Committee have a long-standing rivalry with the Newspaper Club for exploiting their true nature, and had decimated the previous Newspaper Club in the past, leaving Gin the only member.
Kuyo is the first major antagonist and head of the PSC who enforces the group's rules with a tyrannical and sadistic iron fist, going so far to state if someone goes against him, they are against the school. He is a a fox demon bearing four tails and has many fire-based abilities, including the abililty to take on a hybrid form between human and monster, and has an attack called the "Vortex of Flame". In the anime, he believes yōkai and humans will always remain enemies, claiming friendship between the two only occurs in fairy tales even though the Newsclub rescue Tsukune from execution and try to save his life. Although he was easily able to overpower the Newspaper Club with his flame-based powers, he was swiftly defeated by Tsukune after he was injected with Moka's blood. It is unknown if the Headmaster had some kind of punishment given to him.
Keito is a spider-woman ordered by Kuyo to keep an eye on the Newspaper Club. She seems to have a past with Kurumu in the manga, calling her a "newspaper slut" during their initial meeting, and later caught Kurumu distributing the papers with Tsukune despite Gin's warnings. Although she manages to overpower Kurumu and Tsukune with ease, she was swiftly defeated by Inner Moka. In the anime, Keito is in charge of a rival "Super Newspaper Club" which would have replaced the current one, and had three underlings who were former leaders of clubs she and the PSC disbanded placed under her control by her venom. In both adaptations, this action would later spark a conflict between the Protection Committee and the Newspaper Club.
Deshiko Deshi is a red-haired member of the PSC who ends her sentences with "deshi" and is always seen with a bō across her shoulders. She appears as a generic member in the manga, but her role is expanded in the anime and in the second season, where she becomes the first girl on campus to fall under Kou's hypnosis. After the downfall of the PSC in the first season, she has apparently lost the fear and respect she was given as a leader of the PSC and, as seen in the second season, she had to endure regular verbal abuse by the students she once victimized. In the anime, Deshiko's true form is a Jiang Shi.