Katsuragi Keima Kami nomi zo Shiru Sekai Images

Voiced by: Shimono Hiro

Keima Katsuragi (桂木 桂馬 Katsuragi Keima) is the main protagonist of The World God Only Knows manga series, written and illustrated by Tamiki Wakaki. He's known in the gaming world as the "The God of Conquest" (落とし神 Otoshi-gami) for being extremely skilled at conquering every girl in dating sims. He's known in his normal life as "Otomegane" (オタメガネ), a portmanteau of "Otaku" (オタク Nerd) and "Megane" (メガネ Glasses). "Otamegane" can roughly be translated to "gloomy geek with glasses", referring to his silent and extremely cold behavior. Keima is obsessed with games, to the point of closing himself up in his own room and playing for 3 days straight, just to make it for his "deadline" on the Internet.

At the start of the series, Keima is completely detached from reality (although in a very friendly manner), showing absolutely no interest in any real girl, even pointing out that they are flawed. He hates virtually everything from reality, even himself. As a result, he takes refuge in his 2D world. As the series progresses, Keima slowly changes his view of the real. At first, he would verbally abuse and sometimes hit Elsie out of her antics, but as each chapter/episode goes on, he bullies Elsie less and less often.

Source: kaminomi wiki