Arnold's name might be changed when Arnold's official name has been announced by Metro!
Arnold's gender is not confirmed by Metro yet, so the gender given in the article is decided by the Dumb Ways to Die Wiki community.
Be sure Arnold may not be a Lady or Gentleman in the DWtD series!

Arnold is a character who got his head cut off by a bus. He was created by Rtd and Dumb Ways to Die. His death was similar to Stupe, Zany, and Hapless.

Putz wrote:
Or you'll end up like me!
List of Dumb Ways to Die characters
Dumb Ways to Die + App game
Verse 1 Numpty · Hapless · Pillock · Dippy
Verse 2 Dummkopf · Dimwit · Stupe · Lax
Verse 3 Clod · Doomed · Numskull · Bungle
Verse 4 Mishap · Dunce · Calamity · Ninny
Bridge Botch · Doofus · Stumble · Bonehead · Putz
Animals Bear · Piranhas · Rattlesnake · Wasps · Moose[app only] · Panda[app only]
Dumb Ways to Die 2 the Games
The Sports Trio Skellieflop · Loopy · Ruckus
Other characters Dumbbell · Madcap · Zany · Dingy · Boffo · Junior · Knucklehead · Bard · Reite · Boothy · Phyllis · Stupa · Blacksmith · The Dumb Team
Animals Shark · Dolphin · Killer Whale · Penguin · Yeti · Bunyip
Other video
MIFF MIFF Extra Characters
April Fools Numpty's Son
Running of the Bulls Señor Redcape · Bull
Halloween Mr. Ghost · Munchies · Chicken
Christmas Klaus
Trump Ways To Die Trump
Official Facebook page
Super Dumb
Print Advertising
Phoney[app only] · Slaptery · Mr. Gate & Mrs. Gate(with unknown blue characters)

 ● Italic text = Character with unofficial name