Breakway's memories are like the eastern horizon at dawn. When he looks back into his past, he sees only light and warmth and the haloed silhouettes of things that were. He remembers Cybertron only as a word that he ascribes with the warmth and peace he knows lie behind him. What he honestly knows in detail about his life can be emcompassed by the pool of sacred Energon by which he slumbered for centuries.
When he arrived on Earth it was still a barren world. Clouds of ammonia boiled out of volcanos 20 miles high, and the surface - an endless ocean of magma - rolled and bucked with the chaotic energies of planetary formation. He had been sent across the galaxy, across dimensions, with the rarest and most precious form of energy, the source and structure of Transformers life. He alone was to guard it against all eventualities, never to return home until Primus once again called him.
The call has now come, but his charge is not yet ended. Where Breakaway goes, so does his store of rarified Energon. He knows this is so, and he knows that this Energon is too important to leave unprotected. What he cannot remember is exactly why it was he that was chosen to be its guardian for so long.