|Japanese name:||桂木 桂馬|
|Nickname:||The Capturing God, Otamegane, Kami-sama, Tonkotsu|
Birthday: 6 June, 11:29:35 (HH:MM:SS)
Height: 174 cm
Weight: 53 kg
Interests: Bishōjo games (Gal games) and 2D girls
Hates: All 3D girls
Keima is the series main protagonist. A 17-year-old high school student from Maijima Academy, he has an obsessive interest in video games since an early age where he soon became known as "The Capturing God (落とし神 Otoshi-gami?)" on the internet and gaming world for his legendary skills in "capturing" any girls in dating sims especially Bishōjo games. Yet ironically in real life, he is called Otamegane (a derogatory portmanteau of the two words otaku and megane-"glasses") by almost everyone in his school due to his extreme devotion to games. Due to his devotion, the only kind of girls he likes are the girls of the game world as they are, according to him, perfect and with no flaws unlike in real life. His love for games is such that he even goes into withdrawal if he doesn't play enough and has a bad habit of locking himself in his room and playing games for days on end when he's depressed.
At the start of the series, Keima becomes involve in catching runaway spirits from Hell who have hidden themselves in the hearts of girls when he accidentally replies and accepts an email to help Elsie capture them. Because he has made an contractual agreement to help her and the threat of death for both of them should he refuse, Keima begrudgingly has no choice but to agree. In the beginning, he only helps Elsie conquer the hearts of girls in order to capture all of the spirits so he may finish his contract and go back to his "normal life" but as the series progress, Keima soon learns to start appreciate and care for the girls he conquered and promises to help them even though most of them have their memories erased after falling in love with him. This is even true for his view of the real world, something he once considered a world he doesn't want to be involve but now sees it as not such a bad thing.
However, he still insist the game world and its girls are still better. After conquering 14 girls, Keima is 'recruited' by Diana, one of the goddesses of the Jupiter Sisters to help her find her sisters who may have reside within the girls he conquered before as the Jupiter Sisters have the power to reseal the evil spirits back to Hell (and thus finishing his contract). But he soon gets involve in a conspiracy when a mysterious group from Hell called Vintage plans to revived the Old Demons of Hell, who will stop at nothing including hurting the girls Keima conquered before. When one of his past conquest, Kanon, is injured by a Vintage assassin for possessing a Goddess inside of her, Keima, feeling guilty for not protecting her, plans to find the other goddesses quickly in a week in order to save her life.
Voiced by: Hiro Shimono