When it comes to the mentors seen in many anime, they often share motivating and thought-provoking quotes or statements to convince the anime's protagonist to move forward. Whether a teacher is someone like My Teen Romantic Comedy SNAFU's Shizuka Hiratsuka, who showcases care for his students' future, anime tends to highlight these educational figures in a good light.

RELATED: 10 Best Teachers And Mentors In Anime

On the other hand, some anime like to highlight some realistic instances where teachers are downright horrible. Here are the 10 anime teachers who'd get fired instantly.

10 10. Erased: Gaku Yoshiro would Murder & Kidnap Students Without Hesitation

Gaku has an evil smirk on his face

One of anime's most-terrifying serial killers to date, and a teacher that would be fired instantly in real life, is Erased's Gaku Yashiro. At first, Gaku was a kind-hearted teacher who'd ride or die for his students whenever one of them was dealing with difficult circumstances.

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Unbeknownst to his students, Gaku was a cold-hearted and sadistic murderer and kidnapper who would silence anyone he felt would find out about his killing spree. Considering how he targeted adults and children, he wouldn't be allowed in a school.

9 9. Great Teacher Onizuka: Eikichi Onizuka would Be A Bad Influence & be inappropriate with His Female Students

Eikichi looks unamused

Not only does Eikichi Onizuka come from an excellent entry-level comedy anime, but he's an anime teacher that wouldn't last long. Despite being a motivational teacher to his students, Onizuka showcases many characteristics that won't fly in a real-world educational facility.

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Although he doesn't brutally harm his students, Onizuka does take a liking to his female students on a romantic level and often fantasizes about them. Not only that, but Onizuka has broken into his students' homes, damaged his boss' car, and even attacked his students.

8 8. Sayonara, Zetsubou-Sensei: Nozomu Itoshiki Would Influence His Students To kill Themselves

Nozomu is looking at something

Although Sayonara, Zetsubou-Sensei is a strange anime that features highly eccentric characters, the main protagonist, Nozomu Itoshiki, is an anime teacher that would get terminated instantly. Itoshiki's suicidal antics will not serve him well as a teacher meant to lead students into a positive and educational path.

Moreover, Itoshiki also promotes suicide as a way of solving one's emotional stress and anxiety. In the real world, that wouldn't go well with students or their parents, who'd more likely call the principal and complain about Itoshiki's influence on their children's mental health.

7 7. Highschool Of The Dead: Koichi Shido Is Cold-Hearted & Only Cares About Himself

Koichi looks devastated

Even though Highschool of the Dead is one of the best zombie manga ever, according to MyAnimeList, that accomplishment won't save Koichi Shido from being fired on his first day. Although people will undergo the "every man for himself" mentality, Koichi's self-centered attitude won't vibe well with his students in a regular school setting.

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Evidence of Shido's cruel nature would be when he shoved one of his students into a herd of zombies to protect himself. He also has a god complex and has no problems calling anyone a weakling.

6 6. Yu Yu Hakusho: Mr. Iwamoto Is A Selfish Teacher Who Wouldn't Help Trouble-Making Students Become Better People

Mr. Iwamoto is planning something

Yu Yu Hakusho may have many moments that'll leave fans speechless, but Yusuke's teacher, Mr. Iwamoto, will leave fans asking for his termination. Not only does Mr. Iwamoto have no regret for his goal to get Yusuke expelled, but he resorts to absurd measures to fulfill it.

For example, he stole some of his students' belongings to get Yusuke expelled. In the real world, teachers will often share some motivating words with poorly-behaved students in hopes they'll improve. Considering Mr. Iwamoto's low-intolerance to give some students a chance and belittling them, he'd get fired on his first day.

5 5. Naruto: Mizuki Would Manipulate His Students To Commit Crimes & Murder Them Afterward

Mizuki has an evil smirk on his face

Not only is Mizuki one of the most pathetic villains in Naruto, but he's also a teacher that wouldn't last long. Although Mizuki possessed some superb talent as a Hidden Leaf Village teacher, he was a trickster and manipulator to the point where he influenced Naruto Uzumaki to steal a scroll for him.

Moreover, Mizuki even tried to murder Naruto afterward in hopes of hiding any form of evidence for his crime. Mizuki's decision to manipulate his students to commit crimes is one thing, but to kill them for a crime he orchestrated would get him imprisoned.

4 4. Assassination Classroom: Gakuho Asano Is Cold-Hearted & Supports Bullying

Gakuho doesn't look happy

Assassination Classroom may feature a great supporting cast, but one teacher many wouldn't want around their children is Gakuho Asano. Before becoming a despicable mentor, Asano taught his students to be kind-hearted, intelligent individuals. However, after one of his students' dies because of his good-will teachings, Asano went down a darker path.

Essentially, Asano became a cruel teacher demanding students to learn highly-educative topics and created a rank system to lower the self-esteem and motivation of lower-class students. He even encouraged bullying of the less-educated students to boost the superb ones' self-esteem.

3 3. Yu-Gi-Oh! Gx: Vellian Crowler would Resort To Immature Tactics To Get Trouble-Making Students Expelled

Crowler looks upset

Not only is Vellian Crowler one of the best villains in Yu-Gi-Oh!, but he's also a teacher that wouldn't be allowed to teach in real life. In the first season of Yu-Gi-Oh! Gx, Crowler was determined to get the series's protagonist, Jaiden Yuki, expelled from this duelist academy.

The reason is that Jaiden defeated Crowler in a duel, which hurt Crowler's self-esteem. Crowler resorted to tactics as low as placing a love letter in a girl's locker to get him in trouble for peeping. Being obsessive over a student in this manner wouldn't fly in a real-life classroom setting.

2 2. Domestic Girlfriend: Shu Hagiwara would Try Dating One Of His Students Without Hesitation

Shu is performing puppetry

A teacher that wasn't afraid to take things to the next level with one of his students is Shu Hagiwara from Domestic Girlfriend. Although he supported his student Hina Tachibana during her high school days, he became too attached to the girl and went as far as secretly dating her while still being married to another girl.

Despite their relationship happening when Hina's older, it would send some parents in a spiral seeing their daughter or son having an affair with one of their former teachers. Despite being a kind-hearted and caring man, Shu wouldn't be allowed near any students, no matter their age range.

1 1. Interviews With Monster Girls: Tetsuo Takahashi Would Want To Know Too Much Information About Certain Students

Tetsuo looks like he's having a good time

A biology teacher from Interviews with Monster Girls that borders on the line of obsessive and creepy is Tetsuo Takahashi. Although these girls appear to have supernatural traits, they have particular needs and abilities. When taking that into context with Tetsuo's attraction to these demi-humans, his actions align toward a creepier condition.

Instead of helping the demi-humans fit in with society, he only wishes to learn more about their demi-human backgrounds and abilities. Tetsuo even asks questions regarding intercourse and other absurd subject matters. Considering his obsession with the abnormal, schools would want to steer away from letting him teach.

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