Dominus Trannis

Dominus Trannis is a Decepticon combiner from the 2001 Robots in Disguise continuity family.

Seen here after murdering the entire cast of Starlight Express.

Dominus Trannis is a villainous combiner.

He is most often formed from:

• Astrotrain
• Steamhammer
• Loco

Fiction

Ask Vector Prime

Vector Prime brought up Dominus Trannis as an example of a combiner formed from Transformers with train alternate modes. He also explained that in most universes, Dominus Trannis is the result of Rail Racer being reformatted by the Robo-Smasher; in at least one universe, he was brought down by Defensor, who tried in vain to save the minds of his components. Ask Vector Prime

Notes

• An abandoned OTFCC 2004-exclusive redeco of 2001 Robots in Disguise Rail Racer would have been named "Dominus Trannis". While not the same character as the original Trannis, his name was inspired by that character. "Astrotrain" and "Steamhammer" were decided upon as names for two of the components and "Loco" was considered for the third. Steamhammer went on to inspire names for later official toy releases.