King Arthur
This character has no official visual representation in any Transformers product or media... yet, at least.
King Arthur is likely the ruler of a kingdom within Britain in the year 543.
Fiction
The Transformers cartoon
Despite impressions from the Quadwal universal cluster, there was no Decepticon raider in King Arthur's court, although several Transformers travelled to the appropriate area and time. A Decepticon Raider in King Arthur's Court
Spacewarp's Log
Spacewarp met a version of King Arthur Pendragon, this time in the 31st Century, after he'd been frozen in Avalon and she'd time travelled because of Hourglass. His armies fought her for a while, mistaking her for one of their enemies, the Inhumanoids but they realised their mistake soon enough. To repay them, she took Arthur's vassals to the moon, where they protected the Lunarian Queen Mahina's twin infants from their enemy, the Darkling Lord Braxe. The moon responded by staying neutral. Transformers: Spacewarp's Log
