Bragging Rights Reward: You can get a blueprint for his Grim Reaper's Scythe (a 2-handed Five-Star Weapon that can do an insane amount of damage), but only after completing the Stamp Rally.

He does it again to what was meant to be the game's Final Boss, without even looking at it.

Beware the Silly Ones: Despite his goofy attitude and appearance, he still casually one-shots the enemy who kills you in the game's tutorial.

Becoming the Mask: His cheery, encouraging character becomes increasingly genuine as the game goes on.

Anti Anti Christ: He becomes this after the player impresses him and goes back to playing video games.

And the Adventure Continues: After you impress him with your fighting prowess, he foregoes his earlier designs to kill all humans in favor of playing more Let It Die with you.

On the other hand, talking to him in the arcade will sometimes make him mention he apparently doesn't have any organs, though this could just be a lie. His skull appears to be just a mask, as he has a 'regular' mouth between the teeth if you look closely.

With some glasses he wears you can see his eyes, and they're also plainly visible during the final escalator ride to the top floor, where one projection of Uncle Death isn't wearing glasses at all.

And his talking animations don't reveal much either. Note, he appears this way in both the Arcade and within the 'game'. but the outfit covers his entire body and his glasses hide whether or not his face is an actual face or just an elaborate mask.

Ambiguously Human: He appears to be some guy wearing a grim reaper getup.

Almighty Janitor: He's just a Messenger from the Underworld, but he has enough ability and clout to be deemed worthy of the responsibility of wiping out mankind.

Voiced by: Jukka Hilden (English), Kenta Hamano (Japanese)