For those of you who haven't played the original Fallouts (sacrilege, I tells ya!), there's an FEV mutant (just like Harold) called http://fallout.wikia.com/wiki/Talius in Fallout 1, who's a former vault dweller from Vault 13, who was sent out to find a water chip some time before the main character from Fallout 1 was tasked to do so, and ended up being caught by super mutants and dipped in the FEV vats. Instead of becoming a super mutant, he underwent a mutation like Harold's, escaped, and joined up with the http://fallout.wikia.com/wiki/Followers_of_the_Apocalypse.
Now, as Harold is firmly rooted to the ground (or dead) somewhere in the Capital Wasteland, this means that for the first time in the series' history (except Tactics, though there was a http://fallout.wikia.com/wiki/Harold_%28Fallout_Tactics%29), Harold won't be in the game.
On the other hand, the Followers of the Apocalypse ARE in New Vegas, so I wonder, could this mean that Talius might be stepping in to fill Harold's shoes?
On the
other, other hand, do we
need someone to fill Harold's shoes?