Beelzebub

男鹿辰巳

Tatsumi Oga (男鹿 辰巳 , Oga Tatsumi) is the main male protagonist of the series Beelzebub and he's a first-year student at Ishiyama High School.

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邦枝葵

Aoi Kunieda (邦枝 葵 , Kunieda Aoi), also known as Kunie Aoi (青井くにえ , Aoi Kunie), is a second-year from Ishiyama High School and the third leader of Red Tail, as well as a Tōhōshinki member. She, along with Tatsumi Oga, was a class representative during their time at Saint Ishiyama Academy.

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ヒルデガルダ

カイゼル・デ・エンペラーナ・ベルゼバブ4世

Baby Beel is very easily impressed, especially by strong people since he himself is still weak and loses to other babies as well as to cats. On the other hand, he is not the smartest one out there and tries to force his way through the most simple problems. It is also shown that he is afraid of insects. He often displays a fondness for things that might frighten "normal" babies, such as violence, exposed muscle tissue (on an anatomy model), heavy metal music, and demonic toys. He also despises clothes as he is usually seen naked and he tried to remove his clothes (especially his pants) when he accidentally got inside Oga's body (with Oga in his).

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古市貴之

Furuichi has silver hair, something peculiar about his hair is the bang in the middle of his hair, this comically acts as his "Hot chick detector" and the hair stands on end when Furuichi spots a girl of interest. He is usually seen wearing the high school uniforms of the schools he attends to due to his non-delinquent attitude. He often retains a calm face but when Oga or other characters do something outrageous, he turns insane in a somewhat comical fashion.

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バティム・ド・エムナ・アランドロン

Iris is a very attractive woman, as noted by many individuals. Despite their strained relationship due to Iris' painting, both Himekawa and Kugayama attest to the fact that the painting is of a gorgeous woman. Her hair is long and black, similar to Kunieda's, while her face is that of a mature and calm. Despite that she has poor health, her appearance remains similar to a perfectly healthy woman.

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嶋村

While hanging around in the stairway to the rooftop, Shimamura and the other members of the MK5 celebrate the fact that they have recently completed a special technique which they believe will help them gain recognition amongst their peers. Suddenly, Furuichi enters from the rooftop and takes on the MK5 and Shimokawa, defeating all of them with ease. Shocked, especially after hearing Furuichi's response as to why is so powerful, Shimamura and the others beg for him to take them on as his disciples.

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ファバス

Fabas has gilled ears. Her hair is quite unique; it is spiked up save for a few bangs framing her face and is di-colored (mostly red except for the yellow color at her hair's central area). Fabas has purple eyes that are constantly wide open, giving her a slightly deranged appearance. She also wears a long coat on top of her dress like other pillars and pillar heads.

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ネバク