Nimue is a human girl who lived in the countryside some distance from the city of Camelot in the mid-sixth century. The devoted daughter of a feudal lord, Sir Aetheling the Red, she is a bit of a spit-fire and slightly flighty.
- Voice actress: Linda Gary (English), ? (Japan)
During a fight between the Autobots and Decepticons, Starscream, Rumble and Ramjet stumble upon a cave with an interesting energy signature. They accidentally travel back in time, followed by Spike, Hoist and Warpath.
The small group of Decepticons, led by Starscream, decide to rule the Medieval world where they do not have to contend with either Optimus Prime or Megatron. They take the side of a local lord who is battling against one of his neighbors, Nimue's father, for control. Spike and the Autobots promise to help Nimue and her father to defeat them.
In the end, with a little help from the wizard
Merlin Beorht, the Autobots are victorious and they return to the future.
- Nimue is one of the names used for the Lady of the Lake in Arthurian legend.