Ken and Cammy are some of the oldest characters in Street Fighter, with the latter making her debut in Street Fighter II while Ken has been around from the very first game as Ryu's rival.
Interestingly, Ryu has generally enjoyed the bigger fanbase as he has always been a beginner-friendly character and as the protagonist of the story, he is a favorite amongst newer players and fans. But, Street Fighter 6's Ken was presented a lot differently, making him a more fun character to explore within the story. The focus on his story in the prequel comics and his new look are all things that might have led to his surge in popularity.
This was made abundantly clear in the new usage statistics released by Capcom, showing the most used characters across different ranks. Ken and Cammy are at the top in different categories.
There are eight ranks in Street Fighter 6. The usage statistics divided its findings into three broad categories: the first being the Rookie league which houses all those new to the game. The second houses Iron, Bronze, Silver, and Gold ranks, and this is the intermediate class. The final and highest class includes Platinum, Diamond, and Master.
For the Rookie leagues, Cammy was the top used character, with Juri and Ken coming second and third, respectively. Ryu and Luke round out the top five which is fitting as the two 'protagonists' of the game.