Katsuragi Keima

Kami-nii-sama
The protagonist. He is an otaku (here we mean the more derogatory meaning of the term) obsessed with playing galge (“Gal Games” - “Dating Sims”). So obsessed in fact, that he has rejected reality. He is also insanely good at playing galge. So much, that he has earned the title of “Capturing God” - no girl can resist but falling in love with him.
Due to this, he is (involuntarily) recruited by hell to capture runaway spirits.
As time goes on, his rejection of reality slowly dies down more and more.‥ until he ends up falling in love with a girl himself.
He can best be described as intelligent, proud, shameless and efficient. He gets ridiculously good (er, perfect) grades in school and that’s only because he was under the impression teachers wouldn’t mind him playing games if he passed every test. His shamelessness is more in regards to him not caring about the fact people view him as a pathetic otaku… that and he can say and do things that would embarrass the hell out of any normal person.

Something I noticed while re-reading the manga in Japanese^A) is that Keima is much nicer than he needs to be. Despite him essentially being forced into it, he doesn’t actually want to go for the easy option. The easy option, in this case, would mean plugging up the hole in their heart with himself and then just moving on. The hard option (what he goes for) is to help them go thru character development, so they won’t need him to be around. His in-universe justification for this (which I believe is given much much later) is that this plugs up the hole permanently, which means a runaway spirit potentially can’t plug it up again. But that seems like a cop-out to me. More may be written later.