The Grim Reapers are beings managed by Heaven's bureaucratic regimen and charged to collect people's souls in the moment they die as well as review their memories in their last moments, all while trying to be neutral. Shinigami: Crossed with Was Once Human and Driven to Suicide.Mark of the Supernatural: All Grim Reapers have phosphorescent green eyes.Somehow, the Phantomhive bloodline can see them as well. Examples include humans who have signed their life away to a demon. Invisible to Normals: All Grim Reapers can conceal themselves to humans, except for those who are close to death.Everybody Hates Hades: Many of the named reapers have engaged in behavior that ranges from being very apathetic to those on the 'to die' list to crossing straight into evil death god territory, biggest examples of that being Grell, Undertaker, and Eric.Driven to Suicide: How you become a Grim Reaper, as all known reapers committed suicided in their human lives and subsequently reincarnated with the explicit purpose of reaping human souls.To top it all off, their duties are a direct result of their decision to commit suicide in their human lives. While powerful, all reapers are blind without their glasses and their scythes can be blocked by the likes of high-grade cutlery (albeit, supported by Sebastian's demonic strength). Death Is a Loser: As members of a bureaucracy who collects the dead, the Grim Reapers are constantly bogged down in paperwork and assignments (e.g., much grumbling about overtime).William is the most normal of them, but is still a massive stickler for the rules and has no qualms with beating the shit out of his underlings.Despite being a rookie grim reaper, Ronald is the most desensitized to death, implying that there was something wrong with him even before he died. Ronald is perky and outgoing, even when collecting souls and trying to kill Sebastian.

Othello is a scientist who hardly ever visits the human world, can't fight to save his life, and is mentioned to not being above trying to revive the dead (though he doesn't commit said actions because he isn't encouraged enough to do so).

Grell is extremely flamboyant, has a fixation of sorts with the color red, is rather violent and sadistic, and, in the anime, VERY open about her romantic feelings.

Bunny-Ears Lawyer: All Grim Reapers are pretty weird.Blind Without Them: Apparently, all the Grim Reapers are ridiculously near-sighted and can't see without their glasses, for whatever reason.Badass in a Nice Suit: Most Grim Reapers are well-dressed and deadly in battle.This was before the manga revealed that Undertaker became a reaper seventy years before the start of the story and deserted fifty years ago, before Grell and Will were reapers. The anime established that Undertaker is hundreds, if not thousands, of years old, and Grell and Will have been reapers for at least a century.

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