There are a number of fairytale characters that have been considered popular throughout time. These include Little Red Riding Hood, Cinderella, and Sleeping Beauty.
According to a character poll conducted, the most popular character is Haibara Ai.
there isen't really one most popular character i think the most popular would be Suigintou, Suiseseki, Hina Ichigo and Shinku.
Vegeta or gokuits character and its goku
The most popular character in Final Fantasy XIII (13) is Lightning. She is the main protagonist and is on the cover of the case.
darth vader
shikamaru
toon link
Togera
konohomaru
Snooki
susan
There really isn't anyway togaugewho is the most popular, but it could be Roger.