Saber from Fate/Stay Night would be an obvious choice. Since she is also related to the Arthurian legend, there could be a lot of interesting interactions between them. They could compare their experiences as king, or even fight side by side against a common enemy.
The Duke Pendragon in the novel is often portrayed as a strong and fearless leader. He is usually skilled in combat, which helps him defend his land and people.
It's about a series of adventures. It usually involves a hero's journey through different worlds, facing various challenges and foes. It's full of action and mystery.
Pendragon Visual Novel is often about the Arthurian legends. It might include the adventures of King Arthur, his knights, and the magical elements associated with that era. It can have various storylines that explore themes like chivalry, love, and power struggles.
Jundao Wine's Shaohua Wine was positioned as a mid-range wine, but it still maintained the high quality of Jundao's expensive wine. According to the information provided, Shaohua Wine was a new product of the Jundao Wine Series. It was made from high-quality wine produced in the core production area of China's sauce wine and was brewed through strict techniques. In addition, the packaging design and cultural content of Shaohua liquor also reflected the integration of tradition and modern times, satisfying the demands of consumers for higher quality and richer spiritual content of liquor. Although the price of the Shaohua wine wasn't explicitly mentioned, it could be considered a high-quality wine as it was a new product brewed by Monarch.
One possible reason could be a misunderstanding. Maybe Merlin did something that Arthur misinterpreted as betrayal or dishonesty. For example, if Merlin was secretly helping an enemy for a greater good that Arthur wasn't aware of at the time.
As far as I know, there are no widely known 'pendragon muscle woman stories' in the mainstream. It could be a very specific or local concept that hasn't gained broader popularity.
Another aspect to consider in this fanfiction is the cultural clash. The feudal - like society in the Naruto world and Arturia's own Arthurian era background. Arturia might find the concept of ninja villages and the way they are structured quite strange. At the same time, Naruto and his friends could be fascinated by Arturia's tales of Camelot and the Round Table.
A great idea for this fanfiction would be to explore how Arturia adapts to the ninja world. She would have to learn about chakra and ninjutsu. Maybe she could combine her own magic with chakra to create unique attacks. For example, infusing Excalibur with chakra to make it even more powerful. This would also make for some really cool fight scenes in the story.