And separated from one's fellow during the battle, the original Autobot warrior who was wandering Between dimension.
The transformation to Roku-rin armored vehicles.
I continued to wait for the relief of alone fellow he was torn absolute lonely soul.
He was considered to be abandoned to the trust to have the fellow is dominated by despair and guilt, leading to soon have a strong grudge energy.
It has been summoned to this world sensed the energy to Unicron.
It had lost some of the stored by long wandering, we are holding a particularly strong hatred against the convoy commander is a symbol of Cybertron.
This hints far more at G1 roller, especially since they use the word "Original". The way I read it, he was lost to his autobot brethren when Optimus died in he movie and was stuck lost in all dimensions, abadonned. Then he turned into an armoured vehicle. G1 (show) Roller does have the same colout scheme as the vehicle mode he has here.
I think he is angry at optimus for having let himself get killed, leaving Roller stranded across dimensions. And in Any case they mention him being angry at Prime (convoy) and not Orion Pax. Orion became Optimus way later so this bio doesnt line up at all with IDW.
I believe that this combiner is very similar to the Most Wanted theme of last year's Botcon with a bunch of randomness and dimension hopping with the fiction made up just to accompany some interesting toys.
)
limbs 
