Well, it's not a straightforward yes or no. Different games handle this differently. Some might offer Altria Pendragon Alter as a reward for completing challenging story quests, while others might make it more complicated or rare.
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.
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.