Kemo Kobiru no Nikki

Ataru Moroboshi

諸星あたる

Ataru Moroboshi (諸星あたる, Moroboshi Ataru, lit. Falling star to get hit) is the main protagonist of Urusei Yatsura. He is the most lecherous teenager in the universe.

Bio from Fandom, licensed CC BY-SA

Shuutarou Mendou

面堂終太郎

Born April 1, Mendō is heir to the powerful Mendō Zaibatsu. His family has their own private army, a fortune of at least 50 billion yen, and owns 51% of Japan. In Vol. 3 of the manga, he transfers to Tomobiki High School. Handsome, athletic, and talented, all of the girls soon fall for Mendō. Mendō, however, is just as lecherous as Ataru and professes his "love" for Shinobu and other girls, sweeping them off their feet. In stark contrast to this, he treats all of the men of the class like dirt. He frequently parachutes to school from his private jet. Though he walks with a sense of pride and looks down on his fellow male students and their shenanigans, Mendō is actually very similar to them: he is obsessed with women (particularly Lum), he has no respect for Onsen-Mark (though he often pretends he does), he views Ten as a nuisance, and of course, he is jealous of Ataru.

Bio from Fandom, licensed CC BY-SA

Ten

テン

Ten came to earth to see what kind of person Lum's new fiance Ataru Moroboshi was, but he instantly decides that Ataru is not suitable for her. So, with Lum acting as his legal guardian, he moves into the Moroboshi house in order to break them up through various schemes.

Bio from Fandom, licensed CC BY-SA