Orange!!
Don't blame me. Those female characters are just too beautiful, so I have to steal you "protagonists"' spotlight!
No original characters will appear in the early part. If you see an unfamiliar name, it'll only belong to a memorable side character who was never named in the original work.
Later on, when we go up against the Main God and the others, the Main God's lackeys will make an appearance, but that's much, much later.
Fate/Type-Moon's Fourth Holy Grail War plus The Garden of Sinners (complete) - Black Bullet (complete) - Dead House (complete) - Sword Art Online (complete) - Date A Live (complete) - Highschool of the Dead (complete) - DemonsRoot (complete) - Akame ga Kill! (complete) - Guilty Crown (complete) - One Piece (ongoing)