Nezu Dohachiro

Nezu Dohachiro is a minor antagonist of the manga series Reborn!. He is science teacher in Namimori Middle School. He believes that tests are the most important thing and always reminds his students that tests will always appear and that they have to be ready for them. He also dislikes students who get low scores, like Tsuna, and hates students who, despite not putting much effort, score high, like Gokudera.

Why He Sucks:

 * 1) He is your stereotypical greedy teacher who believes school class tests are important for his students. But he has a short temper who dislikes his students with their low scores.
 * 2) He threatened the principal to have  Tsuna, Gokudera and Yamamoto find a time capsule or else he'll expel them for their troubles.
 * 3) He has zero personality nor character development.
 * 4) In the anime version, he pretends to slip and fell down, but lied about brokening his arm.
 * 5) He is a complete moron who thinks the 15 year time capsule didnt exist.
 * 6) He's like Tsuna if he was irresponsible for hiding his failed exams a secret.
 * 7) He tried to hide his falsifying exams for no reason

The Only 3 Redeeming Qualities:
He only appeared in one episode and one chapter.

His voice acting is good

He was thankfully fired when Tsuna and the others found the time capsule that were his 40 year old exams that have low scores, so that Nezu will no longer bother Tsuna and his students ever again for their studies.

Trivia:
He studied at a fourth-class high school and a fifth-class university, a fact that he was lying about.

He studied for eight years at the university until he graduated.

In the manga, only Tsuna and Gokudera were about to get expelled and there was no such re-test. The fifteen year old capsule didn't exist. In the process of finding the capsule, a forty year old capsule came up. It contained Nezu's old exams, all of which had extremely low scores. Nezu was then fired for falsifying his academic transcripts.

Nezu can be compared with Kensuke Mochida, the first antagonist of the series, they are both believed themselves as overachieving, but they fail so easily.