Appearances:  

US Transformers

#61 (Primal Scream)

#62 (Matrix Quest, pt 1: Bird of Prey, in a recap sequence.)

Quote:

 "You dare defile this most SACRED of places with your UNWORTHY presence?!"

Alt-Mode:  

Unknown, possibly none.

Description:  

Basically the Keeper was used as a tool to tell the 'origin' of the Transformers. More importantly he was used to set the stage for the 'Matrix Quest' and the lead up to Unicron's arrival on Cybertron.

The Keeper is the first Transformer in the US comics to ever mention the name 'Unicron' (not counting the comic-book adaptation of the Movie, of course).

Biography:  

The Keeper of Primus was an ancient Transformer created by Primus to watch over him in his great sleep. The Keeper had watched over him for millennia and nothing had happened. Until Bumblebee, Grimlock and the others had shown up.

Bumblebee, Grimlock, Jazz and the Autobot Micromaster Rescue Patrol had been transported into the centre of Cybertron by a kind of 'accident'. When they arrived the Keeper greeted them, angrily. He demanded that they kneel before Primus, their god. They did, willingly. All except Grimlock, who didn't believe for a second that it was really Primus. To convince him it was the genuine article, the Keeper related to Grimlock the story of the Transformers origin. (Built by Primus as the last line of defence against the chaos bringer Unicron.)

The Keeper was then shot dead, by the Decepticon Mayhem Attack Squad (Mk III). Just before he died he warned the Autobots that Primus must not be wakened or Unicron would sense it, and come for them.

Interestingly, in the Generation2 series there was a group of monk-like Transformers who had some resemblance to the keeper. Except for the fact that they weren't drawn very well.

Tech Specs/TFU:  

Not much to say. He died in one blast, so one would assume his stats... well... they must have sucked. He might have had a high intelligence, though.

Toy:  

I'd just love to see them TRY to get his cloak right... *grin*. Still, with today's toy technology, who knows?

Over All:  

The Keeper is significant in that his story lays the foundations for EVERYTHING that occurred from issue 62 onwards. The things he foretold were to be the foundations for almost all the major Autobot, and many major Decepticon, actions throughout this series of comics.

Personally I quite like him, he's visually appealing, and very self-righteous. What more could you want?